Answer:
i think its b
Step-by-step explanation:
i did the math rq and i think i did the problem a week ago
i hope i read ur question right
The value of x is 2yw + y - 1
What is equation?Equation is the defined as mathematical statements that have a minimum of two terms containing variables or numbers is equal.
What is the function?The function is defined as mathematics expression defines a relationship between one variable and another variable. When we say that a variable quantity y is a function of a variable quantity x, we indicate that y depends on x and that value of x determines what value of y will be. This relationship can be expressed as follows: y = f (x)
Given the equation as:
(2x + 2)/y = 4w + 2
To determine the value of x
Multiply by y both sides
y × (2x + 2)/y = (4w + 2) × y
2x + 2 = 4wy + 2y
Subtract 2 from both sides
2x + 2 - 2 = 4wy + 2y - 2
2x = 4wy + 2y - 2
Divide by 2 both sides
x = (4wy + 2y - 2)/2
x = 4wy/2 + 2y/2 - 2/2
x = 2yw + y - 1
Hence, the value of x is 2yw + y - 1.
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please help with this. it’ll mean so much. it’s for my final gradeee
1) Since the value of y varies directly with x, we can write
y=kx Plugging into that
-8 = k(4)
-8 = 4k Divide both sides by 4
k =-2
2) When x = -4 then we can find y by plugging into that
y = kx
y = (-2)(-4)
y = 8
3) Hence, the answer is 8
using the slope formula find the slope of the line that passes through these points (-2,4) and (4,-1)
Answer:
-5/6
Step-by-step explanation:
The formula for slope is [ y2-y1/x2-x1 ].
-1-4/4-(-2)
-5/6
Best of Luck!
Answer:
3/2 or 1.5 :) hope this helped
Step-by-step explanation:
4 - 1 3
------- = --- = 1.5
4 - 2 2
7 of possible A survey conducted in a small business yielded the results shown in the table. Test the claim that health care coverage is independent of gender. Use a 0.05 significance level. What is the value of the test statistic? Men Women Health insurance 50 20 No health insurance 30 10 O A. x² = 5.821 O B.x²=3.841 c. x² = 8.263 O D. x² = 0.1637
The value of the test statistic is x² = 3.841.
Therefore option B is correct.
How do we calculate?Expected frequency for "Health insurance" and "Men"
= (80 * 70) / 110= 50.909
Expected frequency for "Health insurance" and "Women"
= (30 * 70) / 110 = 19.091
Expected frequency for "No health insurance" and "Men"
= (80 * 40) / 110
= 29.091
Expected frequency for "No health insurance" and "Women"
= (30 * 40) / 110 = 10.909
We find the chi-square statistic
χ² = Σ [(O - E)² / E]
χ² = [(50 - 50.909)² / 50.909] + [(20 - 19.091)² / 19.091] + [(30 - 29.091)² / 29.091] + [(10 - 10.909)² / 10.909]
= (0.081² / 50.909) + (0.909² / 19.091) + (0.909² / 29.091) + (0.081² / 10.909)
= 0.00131 + 0.04537 + 0.02784 + 0.00604
= 0.08056
We find the critical value for a 0.05 significance level and 1 degree of freedom = 3.841.
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complete question:
A survey conducted in a small business yielded the results shown in the table. Test the claim that health care coverage is independent of gender. Use a 0.05 significance level. What is the value of the test statistic?
Men Women
Health insurance 50 20
No health insurance 30 10
OA. x^2=0.1637
OB. x^2=8.263
OC. x^2 =3.841
OD. x^2 =5.821
A multiple regression model has a. only one independent variable. b. more than one dependent variable. c. more than one independent variable. d. at least two dependent variables.
In multiple regression analysis, A multiple regression model has more than one independent variable.(option c)
In multiple regression, the goal is to analyze the relationship between a dependent variable and multiple independent variables. The model uses these independent variables to predict or explain the variation in the dependent variable.
Therefore, it is characterized by having more than one independent variable. The number of dependent variables remains one in multiple regression.
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on Tuesday 60 students went to a help session. on Wednesday 72 students went. what is the percent increase in the number of students who went to the help session
Answer:
20
Step-by-step explanation:
(72-60):60*100 =
(72:60-1)*100 =
120-100 = 20
Hope this helps :)
Marilyn needs to buy two Series EE savings bonds as graduation gifts for her cousins. She has $75 to spend. What could be the face value on each bond? (Hint: The face values of the bonds she can buy are $50, $75, and $100. )
Marilyn has $75 to spend on two Series EE savings bonds as graduation gifts. The face values of the bonds she can buy are $50, $75, and $100. Therefore, she could buy two $50 bonds.
Since Marilyn has $75 to spend and she needs to buy two bonds, the total face value of the bonds she can purchase must be equal to $75.
Let x be the face value of the first bond, then the face value of the second bond must be 75 - x.
The face values of the bonds are $50, $75, and $100, so we can set up the following three equations
x + (75 - x) = 75 (since the total face value must be $75)
x = 50 (since the face value must be $50, $75, or $100)
x = 100 (since the face value must be $50, $75, or $100)
Solving these equations, we find that the possible face values for each bond are $50 and $25, $75 and $0, or $100 and $-25 (which is not a valid option).
Therefore, Marilyn could buy two bonds with face values of $50 each, or one bond with a face value of $75 and the other with a face value of $0 (which essentially means she would only be buying one bond).
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Over the last three evenings, Kira received a total of 54 phone calls at the call center. The first evening, she received 10 fewer calls than the second evening. The third evening, she received 2 times as many calls as the second evening. How many phone calls did she receive each evening?
Let x, y, and z be the number of calls Kira received during the first, second, and third day, respectively. Therefore, the equations are
\(\begin{gathered} x+y+z=54 \\ x=y-10 \\ z=2y \end{gathered}\)Solve the system of equations as shown below
\(\begin{gathered} \Rightarrow x+y+z=x+(x+10)+2(x+10)=4x+30 \\ \Rightarrow4x+30=54 \\ \Rightarrow4x=24 \\ \Rightarrow x=6 \end{gathered}\)Use the value of x to find y and z,
\(\begin{gathered} x=6 \\ \Rightarrow6=y-10\Rightarrow y=16 \\ and \\ z=2y=2*16=32 \end{gathered}\)Therefore, the answers are:First evening: 6 callsSecond evening: 16 callsThird evening: 32 callsthe measure of t=90 degrees, rs=4.8 feet , and st=2.4 feet find the measure of r to the nearest degree
Answer:
30
Step-by-step explanation:
Answer:
30
Step-by-step explanation:delta math
What is the opposite of the opposite of any integer?
find the probability that the coin lands heads exactly 11 times. a. 0.1602 b. 0.5731 c. 0.2941 d. 0.1527 e. 0.6374
The probability of landing heads exactly 11 times when a coin is tossed 20 times is option a) 0.1602
The repeated tossing of a coin follows a binomial distribution
P(X = x) = ⁿCₓ pˣ (1 - p)⁽ⁿ ⁻ ˣ⁾
where,
n = No. of times the experiment was repeated
x = random variable defining the number of "successes"
p = probability of "success"
Here
"succeess" is the event of landing a head.
n = 20
x = no. of times heads should show, i.e 11
p = probability of landing a head in a single toss
= 1/2
Hence, putting all this in the formula above we get
P(X = 11) = ²⁰C₁₁ 0.5¹¹ (1 - 0.5)⁽²⁰ ⁻ ¹¹⁾
= ²⁰C₁₁ 0.5¹¹ 0.5⁹
= ²⁰C₁₁ 0.5²⁰
= 20!/ 11! (20 - 11)! X 0.5²⁰
= a) 0.1602
Complete Question
An unbiased coin is tossed 20 times.
Find the probability that the coin lands heads exactly 11 times
a. 0.1602
b. 0.5731
c. 0.2941
d. 0.1527
e. 0.6374
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Solve the notable products (x-12).(x+12)
Answer:
x^2 -144
Step-by-step explanation:
What is 5.6 x 105 in standard notation?
105
x5.6
0630
+5250=
5880
Then add a decimal point
588.0
588
hope it helps!
Answer:
Step-by-step explanation:
First, let's define standard notation. Standard notation is just the normal way to write numbers. So multiply 5.6 x 105 and you get...
g(x)=6x+30 and g(x)=72
Find x
PLS HURRY!!!!!! I would rlly appreciate it THANK YOUU
Answer: 462
Step-by-step explanation: substitute 72 for x in the equation 6(72)+30
a bucket contains 512 gallons of water. water spills from the bucket so that only 5 pints remain. how many pints of water spill from the bucket?
The given problem states that a bucket contains 512 gallons of water. Water spills from the bucket so that only 5 pints remain. We need to find out how many pints of water spill from the bucket. The first step towards the solution of the problem is to convert 512 gallons to pints, which is given below;
1 gallon = 8 pints512 gallons = 8 × 512 pints = 4096 pints. Now, we know that 5 pints of water are remaining after the spill. Hence, the total water that has spilled from the bucket would be;4096 - 5 = 4091 pints. Therefore, 4091 pints of water would have spilled from the bucket.
To solve the given problem, we need to convert gallons to pints, which is given below;1 gallon = 8 pints512 gallons = 8 × 512 pints = 4096 pints. Now, we know that only 5 pints of water remain in the bucket. Hence, we need to find out the total amount of water that has spilled from the bucket. To find out the total amount of water spilled, we need to subtract the remaining water from the initial water, which is given below;4096 - 5 = 4091 pints. Therefore, 4091 pints of water would have spilled from the bucket. Hence, t 4091 pints of water.
It can be concluded that if a bucket contains 512 gallons of water, and water spills from the bucket so that only 5 pints remain, then 4091 pints of water would have spilled from the bucket.
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trig with a picture included
Answer:
26,167 m
Step-by-step explanation:
Step 1: Find the other angle of the complementary set
90 - 17 = 73°
Step 2: Find the angle of elevation from the ship
180 - (73 + 90) = 17°
Step 3: Use tan∅ to find distance
tan17° = 8000/x
xtan17° = 8000
x = 8000/tan17°
x = 26166.8
When using simple linear regression, we would like to use confidence intervals for the ________ and prediction intervals for the ________ at a given value of x.
When using simple linear regression, we would like to use confidence intervals for the mean y-value and prediction intervals for the individual y-value at a given value of x.
What is a regression line?A regression line is a statistical line that best describes the behavior of a data set. This ultimately implies that, a regression line is a line which best fits a set of data.
What is a confidence interval?A confidence interval can be defined as a range of estimated values that defines the probability that a population parameter would fall or lie within it.
In this context, we can infer and logically deduce that statisticians, mathematicians and researchers alike would use confidence intervals for the mean y-value and prediction intervals for the individual y-value at a given value of x, especially when using simple linear regression.
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Sabrina is going to rent a bicycle while in vacation. There are two rental companies she can choose from. The first company charged $10 plus a rate of $2 per hour until the bicycle is returned. The second company’s rental charges can be represented by the equation c=3h+6 where c represents the rental cost and h represents the number of hours the bicycle is rented. If Sabrina plants to bicycle for 3 hours, what is the least amount she could pay in rental fees?
Answer:
9
Step-by-step explanation:
( BRAINLIEST AND THANKS! )
A system of ________ linear equations has no solution.
A) Independent
B) Dependent
C) Inconsistent
How many observations should a time study analyst plan for in an operation that has a standard deviation of 1.5 minutes per piece if the goal is to estimate the mean time per piece to within .4 minute with a confidence of 95.5 percent? (Do not round intermediate calculations. Round up your final answer to the next whole number.)
Number of observations
The time study analyst should account for at least 55 observations in order to calculate the mean time per item with a 95.5% confidence level and a 0.4 minute margin of error.
We can use the sample size calculation formula in a confidence interval to get the number of observations required for a time study with the specified parameters:
\(n = (Z * \sigma / E)^2\)
Where:
n = sample size
Z = The target confidence level's Z-score (95.5% translates to roughly 1.96)
σ = procedure standard variation (1.5 minutes per piece)
E = margin of error (0.4 minutes)
Plugging in the values, we can calculate the sample size:
\(n = (1.96 * 1.5 / 0.4)^2\)
\(n = (2.94 / 0.4)^2\)
\(n = 7.35^2\)
n ≈ 54.02
We round up the sample size to the next whole number because we can't have a portion of an observation:
n = 55
Therefore, the time study analyst should prepare for at least 55 observations to estimate the mean time per item with a margin of error of 0.4 minutes and a confidence level of 95.5%.
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pls pls help due in an hour if you get it right you'll get marked brainliest
Answer:
the first option
Step-by-step explanation:
the table does not have a constant rate of change so it is not linear.
Using the bag of marbles below, find the probability of pulling a blue marble two times in a row. After pulling the first blue marble, you do NOT replace it in the bag before pulling the second one. Each marble has an equally likely chance of being pulled. Answer as a simplified fraction.
The probability of picking two blue marbles is 1/21.
What is the probability?Probability is used to determine how likely it is that a random event would occur. The probability of a random event happening lies between 0 and 1. If it is certain the event would happen, the probability value is 1 and if it is certain that the event would not happen, the probability value is 0.
Probability of picking two blue marbles = (number of blue marbles / total number of marbles) x (number of blue marbles -1 / total number of marbles - 1)
Total number of marbles = 7
(2/7) x (2-1/7-1)
2/7 x 1/6 = 1/21
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CHAD HAS 1/2 TON OF GRAVEL TO SPREAD EQUALLY IN 8 SQUARE YARDS FOR HIS DRIVEWAY. HOW MANY TONS OF GRAVEL WILL BE SPREAD IN EACH SQUARE YARD
Answer:
1/16
Step-by-step explanation:
½ ton ==> 8 sq. yards
so, each sq. yard needs ½ ÷ 8 = 1/16 ton
A store has 15 packs of baseball cards with 28 cards inside and 12 packs of football cards with 34 cards inside.
Which pair of expressions could be used to find how many baseball cards and football cards the store has in all?
(12 x 34) and (12 x 28)
(12 x 28) and (15 x 34)
(15 x 34) and (15 x 28)
(15 x 28) and (12 x 34)
Answer:
the answer is D
Step-by-step explanation:
15 x 28
12 x 34
Answer:
Wrong its A
Step-by-step explanation:
Help, please the question and thank you
It is believed that the best angle to fly a kite is 30 degrees. If you fly a kite at this angle and let out 200 feet of string, approximately how high above the ground will the kite be?
Answer:
200 feet of the ground at a thirty degrees angle does not make a difference .
u need to know whether it is the top or bottom of it, the kite
The following is proportional b. Fill in the missing table, equation and verbal
3.
Graph
11
10
number of Insta posts
time (days)
days.
Mrs Manuel makles
Equation : k=
Time (days)
Insta post every
Equation
Insta post (#)
5
2
6
9
For questions 4-7, use the equation y =54X
4. Find y when x = 8
5. Find x when y = -20
6. Fill in the table.
Answer:
yx=8 and xy=20 so that is the correct answer
Calculator
What is the solution to this inequality?
4x + 8 <_ 28
Drag and drop a symbol and number to correctly complete the inequality.
_9 -5
5
9
Der
Answer:
x<_5
Step-by-step explanation:
first collect the like terms
4x<_28-8
4x/4<_20/4
=x<_5
The time (in minutes) that it takes a mechanic to change oil has an exponential distribution with mean 20.
a) Find P(X < 25), P(X > 15), and P(15 < X < 25)
b) Find the 40th percentile
Using the exponential distribution formula:
(a) P(X < 25) =0.3935, P(X > 15) = 0.2231 and P(15 < X < 25) = 0.1704
(b) The 40th percentile is 29.15 minutes
a) Using the exponential distribution formula:
P(X < 25) = 1 - \(e^{(-25/20)}\)= 0.3935
P(X > 15) = \(e^{(-15/20)}\) = 0.2231
P(15 < X < 25) = P(X < 25) - P(X < 15) = (1 - \(e^{(-25/20)}\)}) - (1 - \(e^{(-15/20)}\)) = 0.1704
b) The 40th percentile is the value x such that P(X < x) = 0.40. Using the exponential distribution formula:
0.40 = 1 - \(e^{(-x/20)}\)
Solving for x:
\(e^{(-x/20)}\)= 0.60
-x/20 = ln(0.60)
x = -20 ln(0.60) = 29.15
Therefore, the 40th percentile is 29.15 minutes.
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The function f() (6x + 4) has one critical number. Find it Check Answer
The value of x is -1/2 if the function f(x) (6x + 4)e^(-6x) has one critical number.
To find the critical number of the function f(x) = (6x + 4)e^(-6x), we need to find the value(s) of x where the derivative of f(x) is equal to zero or undefined.
Let's start by finding the derivative of f(x). We can use the product rule for differentiation:
f'(x) = [(6x + 4) * d(e^(-6x))/dx] + [e^(-6x) * d(6x + 4)/dx]
To differentiate e^(-6x), we use the chain rule, which states that d(e^u)/dx = e^u * du/dx:
d(e^(-6x))/dx = e^(-6x) * d(-6x)/dx = -6e^(-6x)
Differentiating 6x + 4 with respect to x gives us 6.
Substituting these values back into the derivative expression:
f'(x) = [(6x + 4) * (-6e^(-6x))] + [e^(-6x) * 6]
Simplifying:
f'(x) = -36x e^(-6x) - 24e^(-6x) + 6e^(-6x)
Now, let's find the critical number by setting the derivative equal to zero:
-36x e^(-6x) - 24e^(-6x) + 6e^(-6x) = 0
Combining like terms:
-36x e^(-6x) - 18e^(-6x) = 0
Factoring out e^(-6x):
e^(-6x)(-36x - 18) = 0
Now, we have two possibilities:
e^(-6x) = 0 (which is not possible since e^(-6x) is always positive).
-36x - 18 = 0
Solving this equation for x:
-36x = 18
x = 18/(-36)
x = -1/2
Therefore, the critical number of the function f(x) = (6x + 4)e^(-6x) is x = -1/2.
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what is the probability of having x failures in the next 100 mowers tested for x from 0 to 20 mower test
The ratio of the number of mowers that fail to the overall number of mowers is known as the fraction of mowers that fail the functional performance test. Consequently, 9/500 lawnmowers fail, then the probability of having x failures in the next 100 mowers is = \(0.018x\)
Probability of having x mower fail = 0.018x
Number of mowers that fail = 54
Total number of mowers = 3000
The probability of failure can be defined as,
= \(\frac{Number of mowers that fail}{Total number of mowers}\)
Fraction that failed = \(\frac{54}{3000}\)
Fraction that failed = \(\frac{9}{500}\)
Fraction that failed = 0.018
Therefore,
The ratio of the number of mowers that fail to the overall number of mowers is known as the fraction of mowers that fail the functional performance test. Consequently, 9/500 lawnmowers fail, then the probability of having x failures in the next 100 mowers is = \(0.018x\)
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