Y varies directly with x. If y = 15 when x = -18, find y when x = 1.6.

In a home derby competition, there were 32 home runs hit out of 124 hits. Approximately what percent of hits were home runs?

marta [7]

Answer:

26%

Step-by-step explanation:

In home run derby competition there were 32 home rinse hit out of 124 hits approximately

7 0

3 years ago

What is the correct answer?

vladimir1956 [14]

Answer:

17.82

Step-by-step explanation:

since this is a right triangle you can use one of the trigonometric ratios, in this case it would be cosine because you have values for the adjacent and hypotenuse sides

cos(27°) = x/20

x = 20 · cos(27°)

x = 17.82

5 0

3 years ago

Suppose you read online that children first count to 10 successfully when they are 32 months old, on average. You perform a hypo

creativ13 [48]

Answer:

$p_v =2*P(t_{(35)}$

Step-by-step explanation:

Assuming this info from R

hist(gifted$count)

## Min. 1st Qu. Median Mean 3rd Qu. Max.

## 21.00 28.00 31.00 30.69 34.25 39.00

## Sd

## [1] 4.314887

Data given and notation

$\bar X=30.69$ represent the mean

$s=4.3149$ represent the sample standard deviation

$n=36$ sample size

$\mu_o =32$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean is different than 32, the system of hypothesis would be:

Null hypothesis: $\mu = 32$

Alternative hypothesis: $\mu \neq 32$

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$t=\frac{30.69-32}{\frac{4.3149}{\sqrt{36}}}=-1.822$

P-value

The first step is calculate the degrees of freedom, on this case:

$df=n-1=36-1=35$

Since is a two sided test the p value would be:

$p_v =2*P(t_{(35)}$

7 0

3 years ago

Find the product. 31.24 x 3.9 SHOW WORK help me

Novosadov [1.4K]

Answer: 121.836

Step-by-step explanation: So the first thing you need to do is:

31.24

x3.90 you need to put the zero there because the decimal points would need to match up.

_____

Once you do that just put the decimal down. Like this:

31.24

x3.90

____ Once you do that just ignore the decimal and multiply.

.

Once you have finished, the answer should be 121.836.

Hope I Helped!

:)

7 0

3 years ago

Answer the geometry question in the pic and save my life...

Anastasy [175]

Answer:

The answer should be A'(-9,3) B'(12,-6)

Step-by-step explanation:

If you dialate, you multiply every coordinate by 3. -3 x 3= -9. 1 x 3=3. 4 x 3= 12. -2 x 3= -6. So, the last option is correct.

3 0

4 years ago