For Francs, the two most accurate measurements or data points are 3 minutes (45 jumps) and 8 minutes (21 jumps). The equation of the line of best fits for Frank's experiment is equal to 5y = -24x + 275.
We have scatter plots of Frank's two most accurate measurements. When the time, t = 3 minutes, Number of jumping jacks = 45. Similarly, when t = 8 minutes, number of jumping jacks = 21
We need to determine the equation of the line that best fits Frank's experiment.
The equation for the line of best fit can be expressed as, y = mx + b --(1)
where m is the slope and b is the intercept. Now the slope of line, m is the fraction of change in y with change in x. Using the slope formula for two data points, m = ( 21 - 45)/(8 - 3) = - 24/5. The y-intercept, b is equal to the y-coordinate value at x = 0. So, b = 55.
So, form an equation from the formula of equation (1), y = (-24/5)x + 55
=> 5y = - 24x + 2
Therefore, the required equation of line is 5y = - 24x + 275.
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Complete question:
Complete the question above. Frank's two most accurate measurements are 3 minutes and 45 jackpots and 8 minutes and 21 jackpots. Use these two data points to determine which equation for the line best fits Frank's experiment.
The decimal point is rounded to the nearest tenth.
Most experts believe that young children’s not being
given physical affection, this interferes with their
normal development.
(A) young children’s not being given physical
affection, this interferes
(B) for young children who have had physical
affection withheld from them, it interferes
(C) the failure at giving young children physical
affection would interfere
(D) when withholding physical affection from
young children, it interferes
(E) the withholding of physical affection from
young children interferes
(E) "the withholding of physical affection from young children interferes"
The mistake here is in the punctuation. The subject ("young...affection") and its verb are needlessly separated by a comma ("interferes"). Furthermore, the sentence's structure is complicated. Only E fixes these mistakes without introducing any new ones.
There is improper punctuation in Option (A). The subject ("young...affection") and its verb are needlessly separated by a comma ("interferes"). Uncertain pronoun references are present in Option (B). It's unclear to what the pronoun "it" refers.
The incorrect usage of a definite article is in Option (C). The words "the failure" implies that the failure has already been discussed, yet this is false. Choice (D) uses inappropriate wording. "Withholding" is a verb without a subject.
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in the circles so that the sums across (horizontally) and down (vertically) are equal. which number will you place in the middle?
The number 5 will be placed in the middle.
In order to make the sums across and down equal, we have to arrange the numbers in such a way that they balance each other out. We know that the middle number will be the average of the four numbers surrounding it.
So, if we place 2 and 8 on either side of the middle number, the sum of these two numbers is 10. To make the sum equal, we need two more numbers that add up to 10. The only two numbers that fit the criteria are 4 and 6.
Hence, the middle number will be the average of 4 and 6, which is 5. So, the answer is 5.
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--The given question is incomplete; the complete question is
"Place the numbers 2, 4, 5, 6, and 8 in the circles so that the sums across (horizontally) and down (vertically) are equal. Which number will you place in the middle?"--
which graph shows the solution
Answer:
Step-by-step explanation:
Solve:
-6n+5<11
-6n<6 (carry over the 5 by subtracting)
n>-1 (put "n" alone divide by -6, because dividing by a negative flip the symbol)
**Don't forget to carry the Negative Symbol on -6n
So, "A" is the answer
Test:
put in point
0>-1 ✔
or ....
-6n+5<11
-6(0)+5<11
5<11✔
So we know the line arrow goes in the positive direction
Convert 15632 base 7 to base 8
Answer:
10521₈
Step-by-step explanation:
First convert the number from base-7 (septenary) to base-10 (decimal):
\(\begin{aligned}15632_7 & = (1 \times 7^4)+(5 \times 7^3)+(6 \times 7^2)+(3 \times 7^1)+(2\times 7^0)\\& = 2401+1715+294+21+2\\& = 4433_{10}\end{aligned}\)
Now convert it from base-10 (decimal) to base-8 (octal).
Divide 4433 by 8 repeatedly until you arrive at a quotient less than 8.
\(\implies \rm 4433 \div 8 = 554\; r\; 1\)
\(\implies \rm 554 \div 8 = 69\; r\; 2\)
\(\implies \rm 69 \div 8 = 8\; r\; 5\)
\(\implies \rm 8\div 8 = 1\; r \;0\)
Arrange the final quotient and the remainders of all the divisions in the bottom-to-top direction:
10521₈PLEASE HELP!!!
Douglas bikes to 7.68 miles to work 4 days of each week. (He also must bike back home.) On the other 3 days, he rides his bike along a trail that loops back to where he started and is 15.8 miles long. How many miles does Douglas bike each week?
Answer:
108.84
Step-by-step explanation:
7.68*2=15.36 miles every day for work
15.36*4=61.44 miles on the 4 work days
15.8*3=47.4 miles on the other 3 days
61.44+47.4=108.84 miles a week
simplify
(2x - 5)(x + 3) = 0
Answer:
x = 5/2, -3
or
x = 2.5, -3
or
2 1/2, -3
Step-by-step explanation:
Brainliest Please!!
- Hermionia
Answer:
x=-3, 5/2
Step-by-step explanation:
Set each parentheses equal to zero.
1. 2x-5=0
add 5 to both sides
2x=5
Divide by 2
x=5/2
2. (x+3)=0
subtract 3 from both sides
x=-3
What is the value of the expression 6z2+2z+10 when z=3?
Hi there! Hope this helps, and if it does, please mark brainliest!
Answer:
346
Step-by-step explanation:
6z2+2z+10
(6 x 3)^2 + 2 x 3 + 10
18^2 + 12 + 10
324 + 22
346
Draw a line representing the rise And a line representing the run of the mind state is slope of the line in simplest form
Answer:
The slope is (1/5)
Step-by-step explanation:
See attached
explain which properties of equality you used when solving the equation from part a to determine the mystery weight.
To solve the equation in part a and determine the mystery weight, we used the following properties of equality:
Addition property: This property states that if we add the same number to both sides of an equation, the equality is preserved. In this case, we added 23 grams to both sides of the equation to isolate the variable.
Subtraction property: This property states that if we subtract the same number from both sides of an equation, the equality is preserved. In this case, we subtracted 8 grams from both sides of the equation to isolate the variable.
Multiplication property: This property states that if we multiply both sides of an equation by the same number, the equality is preserved. In this case, we multiplied both sides of the equation by 3 to isolate the variable.
Division property: This property states that if we divide both sides of an equation by the same number (excluding 0), the equality is preserved. In this case, we divided both sides of the equation by 2 to isolate the variable.
By using these properties of equality, we were able to manipulate the equation and isolate the variable to determine the mystery weight.
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given the transient performance specs: ζ = 0.5, wn = 3 rad/s. determine the location of the closed-loop complex dominant poles for the system
The transient performance specifications of a system are often defined in terms of the damping ratio (ζ) and the natural frequency (wn). In this case, ζ is given as 0.5 and wn is given as 3 rad/s.
For a second-order system, the complex poles are given by: s = -ζwn ± jwn√(1-ζ^2). Using the given values, we can substitute ζ = 0.5 and wn = 3 rad/s into the equation: s = -0.53 ± j3√(1-0.5^2). Simplifying the equation further: s = -1.5 ± j*2.598.
Therefore, the location of the closed-loop complex dominant poles for the system is at -1.5 ± j*2.598.
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(1 point) find the area of the region outside r=5 5sinθ , but inside r=15sinθ.
The area of the region outside r=5sinθ and inside r=15sinθ is 50π square units.
The area of the region outside r=5sinθ and inside r=15sinθ, we need to evaluate the integral of the area element dA over the region of interest. The area element in polar coordinates is given by dA = r dr dθ.
The region of interest is the annular region between the two circles, which is defined by the inequalities:
5sinθ ≤ r ≤ 15sinθ
0 ≤ θ ≤ π
Thus, the area of the region is given by:
A = \(\int\int dA = \int_0^\pi \int_5sin\theta^{(15sin\theta)} r dr d\theta\)
Using the limits of integration, we can rewrite the integral as:
A = \(\int_0^\pi [1/2 (15sin\theta)^2 - 1/2 (5sin\theta)^2] d\theta\)
Simplifying the integrand, we get:
A = \(1/2 \int_0^\pi (225sin^2\theta - 25sin^2\theta) d\theta\)
A = \(1/2 \int_0^\pi 200sin^2\theta d\theta\)
Using the identity sin²θ = 1/2 - 1/2cos2θ, we get:
A =\(1/2 \int_0^\pi 100 - 100cos2\theta d\theta\)
Integrating, we get:
A = 1/2 [100θ - 50sin2θ] from 0 to π
A = 1/2 [100π - 0] - 1/2 [0 - 0]
A = 50π
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The area of the region outside the polar curve r = 5sinθ and inside the polar curve r = 15sinθ is 50π square units.
To calculate the area between two polar curves, we integrate the outer curve and subtract the integral of the inner curve over the desired interval. In this case, the curves are r = 5sinθ and r = 15sinθ, and we want to find the area from θ = 0 to θ = π.
The equation r = 5sinθ represents the inner curve, and r = 15sinθ represents the outer curve.
Using the formula for the area between two polar curves, the area A can be calculated as follows:
A = (1/2) ∫[θ1,θ2] (r_outer^2 - r_inner^2) dθ
Substituting the given equations, we have:
A = (1/2) ∫[0,π] ((15sinθ)^2 - (5sinθ)^2) dθ
Simplifying the equation further:
A = (1/2) ∫[0,π] (225sin^2θ - 25sin^2θ) dθ
A = (1/2) ∫[0,π] 200sin^2θ dθ
Integrating this equation over the given interval, we get:
A = (1/2) * 200 * ∫[0,π] sin^2θ dθ
Using the identity ∫ sin^2θ dθ = (1/2) * (θ - sinθcosθ), we have:
A = (1/2) * 200 * [(π - sinπcosπ) - (0 - sin0cos0)]
A = (1/2) * 200 * [(π - 0) - (0 - 0)]
A = (1/2) * 200 * π
A = 100π
Finally, we subtract the area enclosed by the inner curve r = 5sinθ to get the area between the curves:
A = 100π - (1/2) * 5^2 * π
A = 100π - 25π
A = 75π
Therefore, the area of the region outside r = 5sinθ but inside r = 15sinθ is 50π square units.
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Need Help ASAP
Slope = -7;(4,-30)
Answer:
y=-7x-2
Step-by-step explanation:
I assume you need the equation for the line, so that's what I'm solving for here.
1. Start by putting the slope and the coordinates into point slope form, which is y-y1=m(x-x1)
y+30=-7(x-4)
2. Distribute -7 to (x-4) (or multiply x and -4 by -7).
y+30=-7x+28
3. Subtract 30 from both sides to get y by itself.
y=-7x-2
Which set of coordinates represents Figure MNOP reflected across the x-axis?
The set of coordinates after the reflection is (c) M' = (-3, -4) N' = (2, -3) O' = (1, -1) P' = (-2, -2)
How to determine the coordinates after the reflection?The graph represents the given parameter
On the graph, we have the following coordinate points
M = (-3, 4)
N = (2, 3)
O = (1, 1)
P = (-2, 2)
The rule of the reflection is given as:
Reflection across the x-axis
Mathematically, this is represented as
(x, y) ⇒ (x, -y)
When this is applied to the points, we have the following representation
M' = (-3, -4)
N' = (2, -3)
O' = (1, -1)
P' = (-2, -2)
Hence, the set of coordinates is (c)
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Suppose you charge $4.50/h for baby-sitting. How much will you earn baby-sitting for 3 1/2 hours?
Answer:
You will earn $15.75, $13.50, or $18 depending on how you are getting paid
Step-by-step explanation:
If you are getting paid a flat rate not by the hour, then simply multiply $3.50 by 3.5 to get $15.75
If you are getting paid by the hour, and only by full hours, the you get $3.50 for the first, second, and third hour, but not for the fourth hour because it has only been a half hour, so only $13.50.
If you are getting paid for each hour that you start, then you get $3.50 for four hours, or $18.00 total
write the equation in slope intercept form from the information given
slope=2/7 y-intercept=0
Answer:
y = 2/7x
Step-by-step explanation:
Sarah peeled 84 oranges in 7 hours. At that rate, how many oranges would she peel in 15 minutes?
a property of the exponential distribution is that the mean equals the .: A. mode B. median C. variance Dstandard deviation
A property of the exponential distribution is that the mean equals the standard deviation.
The exponential distribution is a probability distribution that models the time between successive events in a Poisson process, where events occur continuously and independently at a constant rate.
The probability density function of the exponential distribution is given by:
f(x) = λe⁻ˣ, for x ≥ 0
where λ is the rate parameter, which represents the average number of events per unit time.
The mean of the exponential distribution is given by:
μ = 1/λ
The variance of the exponential distribution is given by:
σ² = 1/λ²
The standard deviation of the exponential distribution is the square root of the variance:
σ = 1/λ
Therefore, we can see that the mean and standard deviation of the exponential distribution are equal:
μ = σ = 1/λ
This property is a consequence of the fact that the exponential distribution is a memoryless distribution, which means that the probability of an event occurring within a certain time interval does not depend on how much time has already elapsed. This property also makes the exponential distribution useful in modeling waiting times and failure times.
Hence, A property of the exponential distribution is that the mean equals the standard deviation.
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Scores of healthy adults on a neurological test form a normal distribution with mean = 100 and sd = 15. what conclusion can be inferred about an individual score that corresponds to a z value of 1.0?
A conclusion which can be inferred about an individual score that corresponds to a z-value of 1.0 is that: c.) it is likely to come from the healthy distribution.
What is a z-value?A z-value is also referred to as a z-score or standard score and it can be defined as a measure of the distance between a raw score and the mean, when standard deviation units are used.
In Statistics, z-values can either be positive or negative and it can be calculated by using this formula:
\(Z=\frac{x\;-\;u}{\delta}\)
Where:
x is the sample mean or observed data.u is the mean.δ is the standard deviation.Since the individual score that corresponds to a z-value of 1.0, we can reasonably infer and logically conclude that an individual score is likely to come from the healthy distribution.
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Complete Question:
Scores of healthy adults on a neurological test form a normal distribution with mean = 100 and SD = 15. What conclusion can be inferred about an individual score that corresponds to a z value of 1.0?
a.) it falls in the general region of the population
distribution
b.) it falls in the common region of the distribution
c.) it is likely to come from the healthy distribution
d.) it is unlikely to come from the healthy distribution
indifference curves cannot be concave to the origin because:
Indifference curves cannot be concave to the origin because they violate the assumption of diminishing marginal rate of substitution (MRS).
Indifference curves represent the different combinations of two goods that yield the same level of satisfaction for an individual. The slope of an indifference curve represents the marginal rate of substitution (MRS), which is the rate at which the individual is willing to trade one good for another while remaining equally satisfied.
If indifference curves were concave to the origin, it would imply that the MRS is increasing as the individual consumes more of both goods. Mathematically, this would mean that the absolute value of the slope of the indifference curve is increasing. However, this contradicts the assumption of diminishing marginal rate of substitution, which states that as an individual consumes more of one good, they are willing to trade less of it for an additional unit of the other good.
To illustrate this, let's consider two goods, X and Y, and assume the individual has a diminishing MRS. Suppose the slope of the indifference curve at a particular point is given by the absolute value of the change in quantity of Y divided by the change in quantity of X (∆Y/∆X). If the indifference curve were concave to the origin, as we move along the curve from left to right, the slope would increase. However, the assumption of diminishing MRS suggests that as we consume more of both goods, the slope should decrease.
In summary, indifference curves cannot be concave to the origin because it would violate the assumption of diminishing marginal rate of substitution. The concavity of indifference curves is inconsistent with the notion that individuals generally exhibit a decreasing willingness to trade one good for another as they consume more of both goods.
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So I got it wrong in my homework how do i translate it?
To translate something:
⇒ is to write out the equations
Let's examine what information this problem gives us:
Mrs. Albert has $400 ⇒ Total money = 400Mrs. Albert bought two adult tickets at $62.50 each⇒ with '2' being the number of adults tickets
⇒total charge from purchasing adult tickets = 2 * 62.5 = 125
Each child ticket costs $42.5⇒ with 'x' being the number of child tickets bought
⇒total charge from purchasing child tickets = 42.5x
Since the sum of total charge from purchasing adult tickets and total charge from purchasing child tickets is equal to 400:
⇒ 42.5x + 125 = 400 <== translated form
Let's solve:
\(42.5x+125=400\\42.5x=275\\x=6.47\)
Since we can only buy whole tickets:
Mrs. Albert could have bought at most 6 child tickets
Answer: Mrs. Albert can bring 6 kids
Hope that helps!
The number 55 is decreased to 53. What is the percentage by which the number was decreased, to the nearest tenth of a percent?
Sasha ordered a kite online. When it arrived, the kite was missing the crossbar. What length crossbar does Sasha need to complete the kite
The length of the crossbar that Sasha needs to complete the kite is 5.66 inches.
What is a triangle?A triangle is a closed, 2-dimensional shape with 3 sides, 3 angles, and 3 vertices.
Triangle is a very common figure to deal with our daily life for example in our daily life to measure the height of any tower then there is a huge application of the right angle triangle.
As per the given crossbar is making a right angle triangle with two 4 inches sides.
Suppose the length of the crossbar is x.
By Pythagoras' theorem,
x = √(4² + 4²) = 5.66 inches.
Hence "The length of the crossbar that Sasha needs to complete the kite is 5.66 inches".
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The missing triangle has been attached below,
PLEASE HELP W/ MATH PROBLEM
Answer:
11. 736080 cars // 12. 5397920 cars
Step-by-step explanation:
given total number of cars produced : 6,134,000
100% -->6,134,000
1%--> 6,134,000 /100
1% --> 61340
given big cars of America is 12%
so to find this 12% = 12 * 61340 = 736080 cars produced by America
by other manufactures = total cars - big cars of America
= 6,134,000 - 7,36,080
= 5397920 cars
Find the equation of the line
The linear equation on the given graph can be written as:
y = (-1/4)*x - 6
How to find the equation of the line?The general linear equation is written as:
y = a*x + b
Where a is the slope and b is the y-intercept.
On the graph we can see that the line intercepts the y-axis at y = -6, then the value of b is -6, so we can write:
y = a*x - 6
To find the value of the slope we can use another point on the graph, we can see that the line passes through (-8, -4)
Replacing these values we get:
-4 = a*-8 - 6
-4 + 6 = -8a
2/-8 = a
-1/4 = a
The linear equation is:
y = (-1/4)*x - 6
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Solve for the unknown 7/G = 35/50
Answer:
g=10
Step-by-step explanation:
\(\frac{7}{g} =\frac{35}{50}\\\)
We can cross multiply so that would be:
\(35g=50*7 \\35g=350 \\g=10\)
Hope this helps and answers your question! Have a great day/night!
Answer:
g=10
Step-by-step explanation:
On December 17, 2007 baseball writer John Hickey wrote an article for the Seattle P-I External link about increases to ticket prices for Seattle Mariners games during the 2008 season. The article included a data set that listed the average ticket price for each MLB team, the league in which the team plays (AL or NL), the number of wins during the 2007 season and the cost per win (in dollars). The data for the 16 National League teams are shown below. team league price wins cost/win
Order goes
Team/ League/ Price/ Wins/ cost per win
Arizona Diamondbacks /NL /19.68/ 90 /35.40
Atlanta Braves NL 17.07 /84/ 32.89
Chicago Cubs NL 34.30 /85/ 65.33
Cincinnati Reds NL 17.90 /72 /40.32
Colorado Rockies NL 14.72 /90 /26.67
Florida Marlins NL 16.70 /71 /38.13
Houston Astros NL 26.66 /73 /59.11
Los Angeles Dodgers NL 20.09 /82 /34.64
Milwaukee Brewers NL 18.11 /83 /35.37
N.Y. Mets NL 25.28 /88 /46.56
Philadelphia Phillies NL 26.73 /89 /48.69
Pittsburgh Pirates NL 17.08 /68 /40.67
San Diego Padres NL 20.83 /89 /38.15
San Francisco Giants NL 24.53 /71/ 56.00
St. Louis Cardinals NL 29.78 /78 /61.91
Washington Nationals NL 20.88 /73 /46.30
Compute the correlation between average 2007 price and number of 2007 wins for these 16 teams. (Assume the correlation conditions have been satisfied and round your answer to the nearest 0.001.)
The correlation between average 2007 price and number of 2007 is 0.207
To compute the correlation between the average 2007 price and the number of 2007 wins for the 16 National League baseball teams, we can use the formula for Pearson's correlation coefficient.
First, we need to calculate the following sums:
Sum of prices (ΣX) = 19.68 + 17.07 + 34.30 + 17.90 + 14.72 + 16.70 + 26.66 + 20.09 + 18.11 + 25.28 + 26.73 + 17.08 + 20.83 + 24.53 + 29.78 + 20.88 = 387.47
Sum of wins (ΣY) = 90 + 84 + 85 + 72 + 90 + 71 + 73 + 82 + 83 + 88 + 89 + 68 + 89 + 71 + 78 + 73 = 1296
Sum of products of prices and wins (ΣXY) = (19.68 * 90) + (17.07 * 84) + (34.30 * 85) + (17.90 * 72) + (14.72 * 90) + (16.70 * 71) + (26.66 * 73) + (20.09 * 82) + (18.11 * 83) + (25.28 * 88) + (26.73 * 89) + (17.08 * 68) + (20.83 * 89) + (24.53 * 71) + (29.78 * 78) + (20.88 * 73) = 24839.87
Sum of squared prices (ΣX^2) = (19.68)^2 + (17.07)^2 + (34.30)^2 + (17.90)^2 + (14.72)^2 + (16.70)^2 + (26.66)^2 + (20.09)^2 + (18.11)^2 + (25.28)^2 + (26.73)^2 + (17.08)^2 + (20.83)^2 + (24.53)^2 + (29.78)^2 + (20.88)^2 = 19151.7899
Sum of squared wins (ΣY^2) = (90)^2 + (84)^2 + (85)^2 + (72)^2 + (90)^2 + (71)^2 + (73)^2 + (82)^2 + (83)^2 + (88)^2 + (89)^2 + (68)^2 + (89)^2 + (71)^2 + (78)^2 + (73)^2 = 94518
Using these sums, we can calculate the correlation coefficient (r):
r = (n * ΣXY - ΣX * ΣY) / sqrt((n * ΣX^2 - (ΣX)^2) * (n * ΣY^2 - (ΣY)^2))
where n is the number of data points, which in this case is 16.
Substituting the values:
r = (16 * 24839.87 - 387.47 * 1296) / sqrt((16 * 19151.7899 - (387.47)^2) * (16 * 94518 - (1296)^2))
Calculating this expression gives us:
r ≈ 0.207
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HELP ME OMG PLEASEEEEEEEEEEEEE
\(v = \frac{lwh}{3} \)
\(v = \frac{12 \times 10 \times 3}{3} \)
\(v = 120 \: {ft}^{3} \)
Volume of the rectangular prism:\(v = lwh\)
\(v = 12 \times 10 \times 7\)
\(v = 840 \: {ft}^{3} \)
Total volume:\(v = 120 + 840\)
\(v = 960 \: {ft}^{3} \)
pyramid:
lwh/2
=12×10×3/3
=120 ft^3
prism:
whl
=12×10×7
=840 ft^3
all together:
=960 ft^3
PLEASEEE HELPPPP!!!!!!!!!skkaksks
Step-by-step explanation:
(√3+√7)(√3+√7)(√3)^2+[(√3*√7)+(√3*√7)]+(√7)^23+2√21+710+2√21On Monday, 423 students went on a field trip to the zoo. All 8 buses were filled and 7 students traveled in cars. How many students
were on each bus? Use the variable, s, to represent the number of students on each bus.
Equation:
S =
students on each bus.
Answer:
There were 52 students on each bus.
Step-by-step explanation:
I divided 8 by 423 and got 52.
Then i did 52 x 8= 416 and i added seven and got 423. so your answer would be 52:)
Trevor built the bookshelf shown below. Each shelf is 2 feet by 2 feet, and the bookshelf is 4 feet tall with a solid board across the back. If Trevor wants to paint all surfaces, including the undersides of each shelf and both sides of the backboard, how many square feet will he paint
Trevor has built a bookshelf which has dimensions of 2 feet by 2 feet for each shelf and a height of 4 feet with a solid board across the back. He wants to paint all surfaces, including the undersides of each shelf and both sides of the backboard.
To calculate the total paintable area, we need to find the area of each shelf and the backboard, and then add them together.
Each shelf has an area of 2 feet x 2 feet = 4 square feet. There are a total of 4 shelves, so the total area of all the shelves is 4 shelves x 4 square feet per shelf = 16 square feet.
The backboard has a height of 4 feet and a width of 2 feet, so its area is 4 feet x 2 feet = 8 square feet. Since both sides of the backboard need to be painted, the total area of the backboard is 2 x 8 square feet = 16 square feet.
Therefore, the total paintable area of the bookshelf is the sum of the area of all the shelves and the backboard, which is:
16 square feet (area of shelves) + 16 square feet (area of backboard) = 32 square feet
Therefore, Trevor will need to paint a total of 32 square feet of surface area on the bookshelf.