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3 years ago

Which function has the smallest y-intercept value?

Mathematics

1 answer:

Lerok [7]3 years ago

8 0

Answer:

Could you... put it normally?

Step-by-step explanation:

It's kinda confusing to read, so much understand

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the length of a rectangle is 4 meters less than twice its width. The area of the rectangle is 70m2. Find the dimensions of the r

Elina [12.6K]

If the width = x m then the length = 2x - 4 m

Area = x(2x - 4) = 70

2x^2 - 4x - 70 = 0

2x^2 - 14x + 10x - 70 = 0

2x(x - 7) + 10(x - 7) = 0

(2x + 10)(x - 7) = 0
x = 7 or -5 ( ignore negative)
width = 7 m and length = 10 m answer

7 0

3 years ago

-x/3+7= -2х +7 <br><br> Need to solve for x

Nezavi [6.7K]

Answer:

x = 0

Step-by-step explanation:

-x/3 + 7 = -2x + 7

Subtract 7 from both sides.

-x/3 = -2x

Add 2x to both sides.

5/3x = 0

x = 0

6 0

2 years ago

Exterior angle theorem <br> what is the value of u? I’m willing to give brainlist!!

KengaRu [80]

Answer: 45

Explanation: two angles that form a Line always equal 180 degrees, so we start with the equation 180-u+47, which is the measure of the missing interior angle measure. All of the angles inside of a triangle also equal 180 degrees, so we can set up this equation to find U:
u-18+u+(180-u+47)=180
We can start to simplify by first simplifying what’s inside the parenthesis:
u-18+u+153-u=180
Then you solve the equation to get
U=45 degrees

4 0

2 years ago

The US Census reported that it takes workers an average of 28 minutes to get home from work with standard deviation 5 minutes. A

xz_007 [3.2K]

Using the z-distribution, as we have the standard deviation for the population, to test the hypothesis, it is found that this is evidence that workers in the large city take longer than 28 minutes to get home from work.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if the mean time is of 28 minutes, that is:

$H_0: \mu = 28$

At the alternative hypothesis, it is tested if the mean time is greater than 28 minutes, that is:

$H_1: \mu > 28$ .

<h3>What is the test statistic?</h3>

The test statistic is given by:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.

$\mu$ is the value tested at the null hypothesis.

$\sigma$ is the standard deviation of the sample.

n is the sample size.

In this problem, the values of the parameters are given by:

$\overline{x} = 32, \mu = 28, \sigma = 5, n = 10$

Hence:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{32 - 28}{\frac{5}{\sqrt{10}}}$

$z = 2.53$

<h3>What is the decision?</h3>

Considering that we have a <em>right-tailed test</em>, as we are testing if the mean is greater than a value, with a standard <em>significance level of 0.05</em>, the critical value is of $z^\ast = 1.645$ .

Since the test statistic is greater than the critical value, it is found that this is evidence that workers in the large city take longer than 28 minutes to get home from work.

To learn more about the z-distribution, you can check brainly.com/question/26454209

4 0

2 years ago

Greg invested $20 and quadrupled his money in five years.Sabrena also invested $20 and after five years the amount was equle to

Strike441 [17]

Sabrena 20x20x20x20=160,000
Greg 20x4=80

3 0

3 years ago