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2 years ago

Please help!

Mathematics

2 answers:

SSSSS [86.1K]2 years ago

5 0

A the correct answer pa brainless po

Morgarella [4.7K]2 years ago

4 0

Answer:

substitution

Step-by-step explanation:

Vertical angles are applicable for parallel lines.

Here the scenario is triangles share a side means they have one common side.

So we can substitute that sides triangle ratios to another triangle

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When buying snacks for her classroom, Ms. Davis bought 4 bags of mixed nuts and 8 bags of pretzels. A bag of pretzels costs $1.5

vfiekz [6]

Answer:

Step-by-step explanation:

The snacks altogether (Pretzels and Nuts) cost 57 dollars.

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3 years ago

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Whats the extreme value?y=3(x+5)^(2)-4

natta225 [31]

Answer:

-4

Step-by-step explanation:

y = 3(x+5)²-4
y= 3(x²+10x+25)-4
y= 3x²+30x+75-4
y= 3x²+30x+71

Derivate the function

y' = 6x+30

solve the equation y'= 0

y'= 6x+30
6x+30= 0
6x= -30
x = -5

The extrme value of y is reached in -5

y = 3(-5+5)²-4= -4

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3 years ago

Solve this equation 3x-√6y=3

Hunter-Best [27]

Answer:

Step-by-step explanation:

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Rewrite in slope-intercept form.

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Using the slope-intercept form, the y-intercept is

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Using the slope-intercept form, the slope is

3 0

3 years ago

The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in t

andreyandreev [35.5K]

Answer:

The test statistic is c. 2.00

The p-value is a. 0.0456

At the 5% level, you b. reject the null hypothesis

Step-by-step explanation:

We want to test to determine whether or not the mean waiting time of all customers is significantly different than 3 minutes.

This means that the mean and the alternate hypothesis are:

Null: $H_{0} = 3$

Alternate: $H_{a} = 3$

The test-statistic is given by:

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

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

Sample of 100 customers.

This means that $n = 100$

3 tested at the null hypothesis

This means that $\mu = 3$

The average length of time it took the customers in the sample to check out was 3.1 minutes.

This means that $X = 3.1$

The population standard deviation is known at 0.5 minutes.

This means that $\sigma = 0.5$

Value of the test-statistic:

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

$z = \frac{3.1 - 3}{\frac{0.5}{\sqrt{100}}}$

$z = 2$

The test statistic is z = 2.

The p-value is

Mean different than 3, so the pvalue is 2 multiplied by 1 subtracted by the pvalue of Z when z = 2.

z = 2 has a pvalue of 0.9772

2*(1 - 0.9772) = 2*0.0228 = 0.0456

At the 5% level

0.0456 < 0.05, which means that the null hypothesis is rejected.

7 0

3 years ago

A scuba diver starts 8 feet below sea level. She then dives down another 13 feet. Which expression gives her total number of fee

scoray [572]

I see this as a basic equation.

If she starts at point x, 8 feet, then goes down another 13, she is adding to the number of feet she traveled down.

So your answer would be 8+13=21

If this isn't what you needed, because I am not sure what math you are taking, let me know if I can help you more!

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3 years ago

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