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2 years ago

Please Help!!!!! 30 Points!!!!

Mathematics

2 answers:

s2008m [1.1K]2 years ago

7 0

Answer:

11 yards

Step-by-step explanation:

zimovet [89]2 years ago

4 0

Answer:

a=11 yards

Step-by-step explanation:

The two triangles are similar as it states. The area is also similar as the sides are similar.

38.5/7 is 5.5

5.5*2 which is the corresponding similar side length, is 11 so a, the missing side length must be 11

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Rachel is collecting donations for the local animal shelter. So far she has collected , which is of what she hopes to collect. H

Rudiy27

Answer:

The money Rachael plan to collect for the shelter is $345.

Step-by-step explanation:

There are some data missing in the question, so below is the complete question:

Rachel is collecting donations for the local animal shelter. So far she has collected $245, which is 70% of what she hopes to collect. How much money does Rachel plan to collect for the shelter?

Now, to find the money Rachael plan to collect for the shelter.

Let the total money Rachael plan to collect be $x.$

The amount far she has collected = $245.

Percentage of amount she hopes to collect = 70%.

Now, to get the total money Rachael plan to collect:

$70\%\ of\ x=245$

$\frac{70}{100} \times x=245$

$0.70x=245$

Dividing both sides by 0.70 we get:

$x=\$345.$

Therefore, the money Rachael plan to collect for the shelter is $345.

8 0

3 years ago

A rally car race course covers 515.97 miles. The winning car completed the course in 6.5 hours. What was the average speed of th

evablogger [386]

Answer:

79.38 miles per hour

Step-by-step explanation:

average speed = miles covered / hours

= 515.97 / 6.5

= 79.38

4 0

3 years ago

Read 2 more answers

A study is performed in San Antonio to determine whether the average weekly grocery bill per five-person family in the town is s

bogdanovich [222]

Answer:

No, the sample evidence is not statistically significant (P-value = 0.125).

To reject the null hypothesis, the P-value has to be smaller than the significance level, so the significance level to reject the null hypothesis has to be 0.125 or higher.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

Then, the null and alternative hypothesis are:

$H_0: \mu=131\\\\H_a:\mu\neq 131$

The significance level is 0.05.

The sample has a size n=50.

The sample mean is M=133.474.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=11.193.

The estimated standard error of the mean is computed using the formula:

$s_M=\dfrac{s}{\sqrt{n}}=\dfrac{11.193}{\sqrt{50}}=1.583$

Then, we can calculate the t-statistic as:

$t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{133.474-131}{1.583}=\dfrac{2.474}{1.583}=1.563$

The degrees of freedom for this sample size are:

$df=n-1=50-1=49$

This test is a two-tailed test, with 49 degrees of freedom and t=1.563, so the P-value for this test is calculated as (using a t-table):

$P-value=2\cdot P(t>1.563)=0.125$

As the P-value (0.125) is bigger than the significance level (0.05), the effect is not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

8 0

3 years ago

2010 0.15

aniked [119]

Answer:

it is a :) hope this helped :)

Step-by-step explanation:

4 0

3 years ago

Quick algebra 1 question for 10 points!

julia-pushkina [17]

B because the amount of money they earn per hour multiplied by how many hours they worked is equal to what they earned in total

7 0

2 years ago