Answer:
D.
Step-by-step explanation:
Opposite numbers will be numbers with opposite signs
Option D shows -3 at one end and +3 at the other; their sum is 0
You want to buy a pet iguana that costs $48. You have $12 from your birthday and you are able to save $9 a week (w) from your allowance. How long will it be before you can afford your iguana?
You need to make an equation for this... Please help!
Answer:
4 weeks
Step-by-step explanation:
9 times 4 is 36. 12 + 36 =48
Farhan has three pieces of rope with lengths of 140 cm, 168 cm and 210 cm. he wishes to cut all the three pieces of ropes into smaller pieces of equal length such that there is no leftover rope. How many smaller pieces of rope can he get altogether?
Answer:
He can get 74 smaller pieces of equal length
Step-by-step explanation:
Here, we want to know the number of smaller pieces he can get
firstly, we need to know the number which is lowest and is a factor of the three
That number is 7
It is a factor of 140 , 168 and 210
for 140, if each length is 7 cm, we can get 140/7 = 20 pieces
From 168, he can get 168/7 = 24 pieces
From 210, he can get 210/7 = 30 pieces
So, the total number of pieces obtainable will be;
30 + 24 + 20 = 74 pieces
8. If the length of a rectangle is (5x+6) units & the breadth is(4x+6) units then for what value of
the perimeter of shape 186 cm?
plz tell both
I will give brainliest
plz answer ASAP
as I need these answers
Answer:
For the value of x = 9, the perimeter of the shape will be 186 cm.
Step-by-step explanation:
Given
Length of rectangle = l = 5x+6 unitsBreadth of rectangle = w = 4x+6 unitsWe know that Perimeter of rectangle = 2(L + w) units
Given that the perimeter of shape 186 cm.
Thus, the equation becomes
2(L + w) = 186
2(5x+6 + 4x+6) = 186
2(9x+12) = 186
Divide both sides by 2
9x+12 = 93
9x = 93-12
9x = 81
Divide both sides by 9
x = 9
Thus, the value of x = 9
Hence, for the value of x = 9, the perimeter of the shape will be 186 cm.
ly and Daniel wrote the following proofs to prove that vertical angles are congruent. Who is correct?
Answer:
Could you show the proofs Iy and Daniel wrote?
Step-by-step explanation:
A researcher wants to compare the performance of three types of pain relievers in volunteers suffering from arthritis. Because people of different ages may suffer arthritis of varying degrees of severity, the subjects are split into two groups: under 60 and over 60. Subjects in each group are randomly assigned to take one of the medications. Twenty minutes later they rate their levels of pain. Which of the following is true about this study?
a.
.
It has two factors, medication and age.
B.
It has one factor (age) blocked by type of medication.
C.
It uses matched pairs.
D.
It is completely randomized.
E.
It has one factor (medication) blocked by age.
The following is true about the study: e. It has one factor (medication) blocked by age.
In statistics, when a factor (independent variable) is blocked by another factor, it means that the effect of the first factor is controlled or eliminated by the second factor.
In this case, the factor that is blocked is the medication, which means that the effect of medication on the outcome variable is controlled by age.
Blocking a factor is often done in experimental design to remove the effects of extraneous variables or to control the influence of certain factors on the outcome variable.
In this case, age is considered a blocking variable because it is not of interest in the study, but it may have an effect on the outcome variable. By blocking the effect of medication by age, the study can better isolate the effect of medication on the outcome variable.
In summary, the statement e. "It has one factor (medication) blocked by age" is correct which means that the study controlled for the effect of age on the outcome variable by blocking the effect of medication by age.
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a compressor has a bore of 8 centimeters and a stroke of 10 centimeters. what is the displacement of the compressor?
The displacement of the compressor is 628 cubic centimeters. Other factors that affect the performance of a compressor include its operating pressure, flow rate, efficiency, and power consumption.
To find the displacement of the compressor, we need to use the formula:
Displacement = (pi/4) x bore^2 x stroke
Here, the bore is 8 centimeters and the stroke is 10 centimeters. So, substituting these values in the formula, we get:
Displacement = (pi/4) x 8^2 x 10
Displacement = (3.14/4) x 64 x 10
Displacement = 628.32 cubic centimeters
A compressor is a mechanical device that is used to increase the pressure of a gas or air by reducing its volume. It works by compressing the gas or air in a cylinder and then transferring it to a storage tank or other equipment. The displacement of a compressor is a measure of the volume of gas or air that is displaced or compressed during one complete cycle of the compressor. Therefore, the displacement of the compressor is 628 cubic centimeters. This means that during one complete cycle of the compressor, it displaces or compresses 628 cubic centimeters of gas or air. The displacement is an important parameter of a compressor, as it determines its capacity or the amount of gas or air that it can compress in a given time.
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The displacement of the compressor is 160π cubic centimeters.
Explanation:To find the displacement of the compressor, we first need to understand what displacement means. Displacement is the change in position of an object in a specific direction. In this case, the compressor has a bore of 8 centimeters and a stroke of 10 centimeters. The displacement of the compressor can be calculated as the product of the bore area (πr^2) and the stroke length.
First, we need to find the radius of the bore. Since the diameter is 8 centimeters, the radius would be half of that, which is 4 centimeters.Now, we can calculate the displacement by multiplying the bore area (πr^2) and the stroke length. The bore area is π(4^2) and the stroke length is 10 centimeters. Plugging in these values, we get:Displacement = π(4^2) * 10 = 16π * 10 = 160π cubic centimeters.
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Which inequality is true?
А. 9п> 27
B. п- З> 1
ос. >1
D. П+7< 10
\(\bold{Hello!}\\\bold{Your~Answer~Is~Below!}\)
______________________________
\(\bold{Solution~Steps:}\)
\(1.)~Determine~if~True~or~False:\)
\(\bold{9\pi >27=True.}\)\(\bold{\pi -3>1=False.}\)\(\bold{\frac{9}{3\pi }>1=False.}\)\(\bold{\pi +7<10=False.}\)______________________________
\(\bold{Answer:}\)
\(\boxed{\bold{A~is~True.}}\)______________________________
\(\bold{Hope~this~helps,}\\\bold{And~best~of~luck!}\\\\\bold{~~~~~~~-TotallyNotTrillex}\)
Manuel is blowing up balloons for a party at his house .he blows up 30 balloons in 10 minutes.how many balloons does he blow up in one minute ?
Answer:
it is 3 i think
Step-by-step explanatplease mark brainlest
can someone help please
Answer:
1.6
Step-by-step explanation:
less than (<), greater than (>), and not (not equal to) are examples of ____.
Answer: Less than (<), greater than (>), and not (not equal to) are examples of comparison operators.
Step-by-step explanation: They show a comparison between the two operands.
what is 2/3d -8=1/2d
Answer:
d = 48
Step-by-step explanation:
An animation shows a beetle crawling in a straight line from the point (0, 10) to the point (28, 84) in 2 seconds. write a pair of parametric equations to model the path of the beetle. which point represents the location of the beetle 5 seconds after starting? (38, 94) (70, 195) (80, 185) (184, 269)
Point (80, 185) represents the location of the beetle 5 seconds after starting.
An equation of this type is known as a parametric equation; it uses an independent variable known as a parameter (commonly represented by t) and dependent variables that are defined as continuous functions of the parameter and independent of other variables. When necessary, more than one parameter can be used. For instance, the equation y = x2 can be expressed as a pair of equations in parametric form, x = t and y = t2, rather than the Cartesian form of y = x2. Parameterization, which transforms a function into a parametric form, greatly improves the efficiency of differentiating and integrating curves.
The parametric equations for the path of the beetle are:
x(t) = 28t
y(t) = 84t + 10
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Answer:
it’s not 80,185 I got it wrong on edge
Step-by-step explanation:
ugh
An experiment to compare the spreading rates of five different brands of yellow interior latex paint available in a particular area used 4 gallons () = 4) of each paint. The sample average spreading rates (ft2/gal) for the five brands were x. = 462.0, x = 512.8, = 437.5, * = 469.3, and x = 532.1. The computed value of F was found to be significant at level a = 0.05. With MSE = 190.8, use Tukey's procedure to investigate significant differences between brands. (Round your answer to two decimal places.) w = Which means differ significantly from one another? (Select all that apply.). * and 2 *, and X and X and is X and x and X, and a X and X Xands and also ixi ixi ixti i gi iyi oxi 1x There are no significant differences.
To investigate significant differences between the brands of yellow interior latex paint using Tukey's procedure, we need to calculate the difference between each pair of means and compare them to the critical value obtained from the studentized range distribution. If the difference is greater than the critical value, it indicates a significant difference between the corresponding brands.
First, let's calculate the critical value using the significance level α = 0.05 and the degrees of freedom for the denominator (within-group) error, which is the total sample size (n) minus the number of groups (k). In this case, n = 4 (gallons) × 5 (brands) = 20 and k = 5.
Degrees of freedom for the denominator error:
df_denom = n - k = 20 - 5 = 15
Using a critical value table or statistical software, the critical value for α = 0.05 and df_denom = 15 is approximately 3.055.
Next, we calculate the absolute difference between each pair of means and compare it to the critical value:
1. |462.0 - 512.8| = 50.8 > 3.055 (significant difference)
2. |462.0 - 437.5| = 24.5 < 3.055 (no significant difference)
3. |462.0 - 469.3| = 7.3 < 3.055 (no significant difference)
4. |462.0 - 532.1| = 70.1 > 3.055 (significant difference)
5. |512.8 - 437.5| = 75.3 > 3.055 (significant difference)
6. |512.8 - 469.3| = 43.5 > 3.055 (significant difference)
7. |512.8 - 532.1| = 19.3 < 3.055 (no significant difference)
8. |437.5 - 469.3| = 31.8 > 3.055 (significant difference)
9. |437.5 - 532.1| = 94.6 > 3.055 (significant difference)
10. |469.3 - 532.1| = 62.8 > 3.055 (significant difference)
Based on the comparisons above, the pairs of means that differ significantly from one another are:
- Brand 1 (x) and Brand 2 (x): |462.0 - 512.8| = 50.8
- Brand 1 (x) and Brand 5 (x): |462.0 - 532.1| = 70.1
- Brand 2 (x) and Brand 5 (x): |512.8 - 532.1| = 19.3
- Brand 3 (x) and Brand 5 (x): |437.5 - 532.1| = 94.6
- Brand 3 (x) and Brand 4 (x): |437.5 - 469.3| = 31.8
- Brand 4 (x) and Brand 5 (x): |469.3 - 532.1| = 62.8
Therefore, the brands that differ significantly from one another are: Brand 1 (x) and Brand 2 (x), Brand 1 (x) and Brand 5 (x), Brand 2 (x) and Brand 5 (x), Brand 3 (x) and Brand 5 (x), Brand 3 (x) and Brand 4 (x), Brand 4 (x) and Brand 5(x).
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Yesterday Lou and $12.76 selling lemonade and $4.87 selling ice pops at his stand today bought two pizzas for five dollars each how much money does he have left
Answer:
7.89
Step-by-step explanation:
Subtract on calculator bro!
Answer:
its 7.63
Step-by-step explanation:
Which of the following expressions are polynomials? Justify your answer:(1) 8(ii) √3x² - 2x(iii) 1 - √5x(iv) 1/5x-2 +5x+7(v)(x-2)(x-4)/X(vi)1/x+1(vii)1/7 a^3 - 1/√3a^2 + 4a-7(viii) 1/2xa. Polynomials: (ii), (vi), (vii)b. Polynomials: (i), (ii), (iv), (vii)c. Polynomials: (ii), (iii), (iv), (vii)d. Polynomials: (i), (ii), (vii)
B) Therefore, the polynomials among the given options are (i), (ii), (iv), and (vii).
A polynomial is a mathematical expression made up of constants, variables, and non-negative integer exponents.
It can have no variable at all, one variable or multiple variables.
A polynomial can't have a negative exponent. It never has division by a variable. Based on this definition, options
(iii) 1- √5x
(v) (x-2)(x-4)/x
(vi) 1/x+1, and
(viii)1/2xa
are not polynomials because they have fractional exponents or negative exponents.
Therefore, the polynomials among the given options are (i), (ii), (iv), and (vii) because they do not have fractional or negatice exponent.
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If B is the midpoint of AC, and AC = &r - 20 find BC.
The measure of BC from the figure shown is 26
What is a line?A line is the distance between two points. From the given line AC;
AC = AB + BC
Given the following parameters
AC = 8x - 20
AB = 3x - 1
Required
Length BC
Substitute
8x-20 = 3x-1 + BC
BC = 8x-20 -(3x - 1)
BC = 8x - 20 - 3x + 1
BC = 5x - 19
Since B is the midpoint of AC, then;
AB = BC
3x - 1 = 5x - 19
-2x = -18
x = 9
Determine the length of BC
BC = 5(9) - 19
BC = 45 - 19
BC = 26
Hence the measure of BC from the figure shown is 26
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The measure of angle R is 3 degrees less than twice the measure of angle S. If the sum of the measures of the two angles is 72 degrees, find the measure of each angle.
Measures of the given angles:
∠S = 25° and ∠R = 47°
What is an angle?In geometry, an angle is formed when two rays are joined at their endpoints. These rays are called the sides or arms of the angle.
There are two main parts related to an angle - the arms and the vertex.
Given,
Measure of angle R is 3 degrees less than twice the measure of angle S
⇒ 2∠S - ∠R = 3°
⇒ ∠R = 2∠S - 3° ------(a)
Sum of R and S
⇒ ∠R + ∠S = 72°
Substituting ∠R in terms of ∠S in above equation from equation (a)
2∠S - 3° + ∠S = 72°
3∠S - 3° = 72°
3∠S = 72° + 3°
3∠S = 75°
∠S = 75°/3
∠S = 25°
Substituting value of ∠S in equation (a)
∠R = 2 × 25° - 3°
∠R = 50° - 3°
∠R = 47°
Hence, ∠S = 25° and ∠R = 47° are the measures of given angles.
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you can infer causality from a correlational result, but only when the r value is greater than
Therefore, the r value alone is not enough to infer causality, regardless of its magnitude.
What is correlation coefficient (r value)?The correlation coefficient, also known as the Pearson correlation coefficient or Pearson's r, is a measure of the strength and direction of the linear relationship between two continuous variables. It is expressed as a number between -1 and 1, where -1 indicates a perfect negative correlation (meaning that as one variable increases, the other decreases), 1 indicates a perfect positive correlation (meaning that as one variable increases, the other also increases), and 0 indicates no correlation. The value of the correlation coefficient provides information about how closely the two variables are related, but it does not establish causality.
According to question:The r value alone is not enough to infer causality. A high correlation coefficient suggests a strong relationship between two variables, but causality means that one variable is causing the changes in the other variable and requires a causal mechanism and a demonstration of a temporal relationship between the variables.
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Look over Chuck's work What is incorrect about the way Chuck interpreted his problem? What should have been a clue to Chuck that something was wrong?
The probability that a random student will be taking both Algebra 2 and Chemistry is 0.0136 or 1.36%.
To find the probability that a random student will be taking both Algebra 2 and Chemistry, we need to use the concept of conditional probability.
Let's denote the event of taking Algebra 2 as A and the event of taking Chemistry as C. We are given that P(A) = 0.08 (8% probability of taking Algebra 2) and P(C|A) = 0.17 (17% probability of taking Chemistry given that the student is taking Algebra 2).
The probability of taking both Algebra 2 and Chemistry can be calculated using the formula for conditional probability:
P(A and C) = P(C|A) * P(A)
Substituting the given values:
P(A and C) = 0.17 * 0.08
P(A and C) = 0.0136
Therefore, the probability that a random student will be taking both Algebra 2 and Chemistry is 0.0136 or 1.36%.
It is important to note that the probability of taking both Algebra 2 and Chemistry is determined by the intersection of the two events, which means students who are taking both courses. In this case, the probability is relatively low, as it depends on the individual probabilities of each course and the conditional probability given that a student is taking Algebra 2.
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a sample of 800 computer chips revealed that 60% of the chips do not fail in the first 1000 hours of their use. the company's promotional literature claimed that above 55% do not fail in the first 1000 hours of their use. is there sufficient evidence at the 0.01 level to support the company's claim? state the null and alternative hypotheses for the above scenario.
The company's claim can be evaluated using a hypothesis test. The null hypothesis, denoted as H0, assumes that the true proportion of chips that do not fail in the first 1000 hours is 55% or lower.
Ha stands for the alternative hypothesis, which assumes that the real proportion is higher than 55%. This test has a significance level of 0.01.
A sample of 800 chips was taken based on the information provided, and it was discovered that 60% of them do not fail in the first 1000 hours. A one-sample percentage test can be used to verify the assertion. The test statistic for this test is the z-score, which is calculated as:
\(\[ z = \frac{{p - p_0}}{{\sqrt{\frac{{p_0(1-p_0)}}{n}}}} \]\)
If n is the sample size, p0 is the null hypothesis' assumed proportion, and p is the sample proportion.
If we substitute the values, we get:
\(\[ z = \frac{{0.6 - 0.55}}{{\sqrt{\frac{{0.55(1-0.55)}}{800}}}} \]\)
The z-score for this assertion is calculated, and we find that it is approximately 2.86.
In order to determine whether there is sufficient data to support the company's claim, we compare the computed z-score with the essential value. At a significance level of 0.01 the critical value for a one-tailed test is approximately 2.33.
Because the estimated z-score (2.86) is larger than the determining value (2.33), we reject the null hypothesis. Therefore, the company's assertion that more than 55% of the chips do not fail in the first 1000 hours of use is supported by sufficient data at the 0.01 level.
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Solve this question. a/7-3<0
Answer:
\(\boxed{\sf{a<21}}\)
Step-by-step explanation:
You only need to isolate the term a to solve this problem.
Add by 3 from both sides.
\(\sf{\dfrac{a}{7}-3+3<0+3}\)
Solve.
0+3=3
a/7<3
Multiply by 7 from both sides.
\(\sf{\dfrac{7a}{7}<3*7}\)
Solve.
3*7=21
a<21
As a result, the solution is a<21, which is our answer.
what is 40% of 50?.
Answer:
The answer is 20
Step-by-step explanation:
0.4 = 40%
0.4 * 50 = 20
How would you suggest that managers avoid the quick-fix mentality that makes management by best-seller so tempting?
You can suggest that managers should avoid the quick-fix mentality that makes management by best-seller so tempting by implementing the following strategies:
1. Understand the Unique Nature of Your Business: Managers should take the time to understand the unique nature of their business. They should realize that what worked for another company may not work for their own company.
2. Avoid Short-Term Solutions: Managers should avoid short-term solutions that provide quick results. They should focus on long-term solutions that will benefit the organization in the long run.
3. Develop a Comprehensive Strategy: Managers should develop a comprehensive strategy that includes long-term goals and objectives. They should also have a plan in place to achieve those goals.
4. Invest in Employee Development: Managers should invest in employee development by providing training and development opportunities. This will help to build a strong workforce that is capable of handling complex challenges.
5. Encourage Collaboration: Managers should encourage collaboration among team members. This will help to create a culture of teamwork and cooperation.
6. Monitor Progress: Managers should monitor progress and adjust strategies as necessary. This will help to ensure that the organization is on track to achieving its goals.
By following these strategies, managers can avoid the quick-fix mentality that makes management by best-seller so tempting. They can focus on long-term solutions that will benefit the organization in the long run.
Hope this helped you...
simplifiy the equations and show ur work
The simplest form is (-2 ±√12)/2.
What is simplification?
To simplify simply means to make anything easier. In mathematics, simplifying an equation, fraction, or problem means taking it and making it simpler. Calculations and problem-solving techniques simplify the issue. Simplifying procedures is one way to achieve uniformity in work efforts, expenses, and time. It reduces diversity and variety that is pointless, harmful, or unnecessary.
Here, we have
Given: x = (-4 ±√48)/4
We have to simplify the given term.
x = (-4 ±√48)/4
x = (-4 ±√12×4)/4
x =(-4 ±2√12)/4
Now, we take 2 as common and get
x = (-2 ±√12)/2
Hence, the simplest form is (-2 ±√12)/2.
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What is the speed of an auto that travels from Bloomfield to Atlantic City (120 miles) in 2 hours
9514 1404 393
Answer:
60 miles per hour
Step-by-step explanation:
Speed in miles per hour is found by dividing miles by hours:
(120 mi)/(2 h) = (120/2) mi/h = 60 mi/h
Given PQRS, what is the measure of QOA 90•OB. 140OC. 40°O D. 25°OE 240°OF 50°. Hurry pls
Answer:
Choice C: 40 degrees
Explanation:
Because the given figure is a parallelogram, it contains two pairs of equal angles
Answer:
40 degrees
Step-by-step explanation:
a survey of athletes at a high school is conducted, and the following facts are discovered: 43% of the athletes are football players, 56% are basketball players, and 4% of the athletes play both football and basketball. an athlete is chosen at random from the high school: what is the probability that they are either a football player or a basketball player? enter your answer as a percentage.
the probability that the randomly chosen athlete is either a football player or a basketball player is 99%.
To find the probability that the randomly chosen athlete is either a football player or a basketball player, we need to calculate the union of the probabilities.
Let's denote the probability of being a football player as P(F) and the probability of being a basketball player as P(B). We are given the following information:
P(F) = 43% = 0.43
P(B) = 56% = 0.56
P(F ∩ B) = 4% = 0.04 (since 4% play both football and basketball)
The probability that an athlete is either a football player or a basketball player can be calculated using the formula:
P(F or B) = P(F) + P(B) - P(F ∩ B)
Plugging in the values:
P(F or B) = 0.43 + 0.56 - 0.04
= 0.99
Therefore, the probability that the randomly chosen athlete is either a football player or a basketball player is 99%.
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A baker made 7 cupcakes. Four people want to share them equally. How many cupcakes will each person get?
Answer:
each person will get 1 cupcake and there will be 3 cupcakes left over
Step-by-step explanation:
true / false : decide if the computer games are more effective than paper and pencil drills for children learning the multiplication tables.
Answer:
True, making multiplication a game can motivate children to learn.
Chang rented some movies and video games last month. He did the same this month. The table below shows the number of movies and video games ne renter each month. It also shows the total cost (in dollars).
Answer:
See below
Step-by-step explanation:
Cost of movie => x
Cost of video game => y
5x + 3y = 24
2x + 12y = 69 or 34.5-6y = x
Substitute
5x + 3y = 24
5(34.5-6y) + 3y = 24
172.5 - 30y + 3y = 24
-27y = -148.5
y = 5.5
34.5-6y = x
34.5-6(5.5) = x
x = 1.5