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3 years ago

Need a teacher or someone who's good at solving 11th grade equation

Mathematics

1 answer:

kumpel [21]3 years ago

4 0

Answer:

(y-24)=-7(x+4)

Step-by-step explanation:

To write the equation of a line we must have a slope and a point. To find the slope we use the slope formula and substitute (x,y) points in it as shown below:

$m=\frac{y_2-y_1}{x_2-x_1}=\frac{24--53}{-4-7}=\frac{24+53}{-4+-7}=\frac{77}{-11}=\frac{-7}{1}=-7$

Now that we have the slope, plug in the slope and choose one point to plug into the point slope formula. Use the point-slope form to write the equation, then simplify and convert into the slope intercept form.

(y-24)=-7(x--4)

(y-24)=-7(x+4)

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If it takes 7 minutes to label and cap 60 bottles, how long will it take to do 480 bottles?

Lera25 [3.4K]

Answer: 56

Step-by-step explanation: 7*480= 3360

3360/60= 56

5 0

3 years ago

Read 2 more answers

A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained p

Studentka2010 [4]

Using the z-distribution, it is found that the needed sample sizes are:

a) 242

b) 1842

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which z is the z-score that has a p-value of $\frac{1+\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

99% confidence level, hence $\alpha = 0.99$ , z is the value of Z that has a p-value of $\frac{1+0.99}{2} = 0.995$ , so $z = 2.575$ .

Item a:

The estimate is:

$\pi = 0.223 - 0.189 = 0.034$

The sample size is <u>n for which M = 0.03</u>, then:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 2.575\sqrt{\frac{0.034(0.966)}{n}}$

$0.03\sqrt{n} = 2.575\sqrt{0.034(0.966)}$

$\sqrt{n} = \frac{2.575\sqrt{0.034(0.966)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{2.575\sqrt{0.034(0.966)}}{0.03}\right)^2$

$n = 241.97$

Rounding up, a sample of 242 is needed.

Item b:

No prior estimates, hence $\pi = 0.5$ is used.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 2.575\sqrt{\frac{0.5(0.5)}{n}}$

$0.03\sqrt{n} = 2.575\sqrt{0.5(0.5)}$

$\sqrt{n} = \frac{2.575\sqrt{0.5(0.5)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{2.575\sqrt{0.5(0.5)}}{0.03}\right)^2$

$n = 1841.8$

Rounding up, a sample of 1842 is needed.

For more on the z-distribution, you can check brainly.com/question/25404151

5 0

3 years ago

Given two sets of polar coordinates that could be used to play the given point

topjm [15]

Answer: a. (2.5, 300°) and (-2.5, 120°)

b. (4, 270°) and (-4, 90°)

<u>Step-by-step explanation:</u>

Polar coordinates are written as (r, θ) where

r is the radius
θ is the angle

In the first graph, the radius is 2.5 and the angle is 300° --> (2.5, 300°)

You can also list the radius as -2.5 at angle 120° --> (-2.5, 120°)

↓

(300 - 180)

In the second graph, the radius is 4 and the angle is 270° --> (4, 270°)

You can also list the radius as -4 at angle 90° --> (-4, 90°)

↓

(270 - 180)

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3 years ago

The table below shows the number of kool-aid packets needed to make different amounts of fruit punch. What is the total number o

madreJ [45]

Answer: 30

Step-by-step explanation:

4 0

3 years ago

Draw a line graph that represents the relationship between mass and kinetic energy in Experiment 2. Make sure to give the graph

Leya [2.2K]

The linear function that maps the relation between kinetic energy and mass is given at the end of the question.

<h3>What is the kinetic energy of an object?</h3>

The kinetic energy of an object is given by the following formula:

E = 0.5mv².

In which:

m is the mass of the object.

v is the velocity of the object.

In this problem, we suppose a velocity of 2.5 m/s, hence the kinetic energy is:

E = 0.5m(2.5)² = 3.125m.

Hence the graph is plotted at the end of the answer.

More can be learned about kinetic energy at brainly.com/question/25959744

#SPJ1

4 0

1 year ago