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3 years ago

Write a variable expression for 9 more than a number s.

Mathematics

1 answer:

Vladimir [108]3 years ago

7 0

S+9

More than suggests addition.

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Mr. Champion open a savings account to begin saving money for genies called seriously deposit $250 in the account Mr. Tt Mr. Cha

sammy [17]

$50 per month
there are 12 months
in 2 years there are 24 months
24(50)=
$1200

The answer is $1200

Hope this helps, and please put me as most brainiest answer!

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3 years ago

Find the measure of angle U

Rudiy27

Answer:

Step-by-step explanation:

180-110=70

70+80=150

180-150=30

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3 years ago

10x+2=32 what does x stand for

Sever21 [200]

Answer: x = 3

First, subtract 2 from both sides of the equation to get 10x = 30.

Then divide both sides by 10 to isolate x and you get x = 3.

Hope this is helpful :)

7 0

3 years ago

Read 2 more answers

A men’s softball league is experimenting with a yellow baseball that is easier to see during night games. One way to judge the e

vodomira [7]

Answer:

Yes. There is enough evidence to support the claim that there are fewer errors on average when the yellow ball is used.

Step-by-step explanation:

The question is incomplete:

The sample data is:

Yellow 5 2 6 7 2 5 3 8 4 9

White 7 6 8 5 9 11 8 3 6 10

This is a hypothesis test for the difference between populations means.

The claim is that there are fewer errors on average when the yellow ball is used.

Then, the null and alternative hypothesis are:

$H_0: \mu_1-\mu_2=0\\\\H_a:\mu_1-\mu_2< 0$

The significance level is α=0.05.

The sample 1 (yellow ball errors), of size n1=10 has a mean of 5.1 and a standard deviation of 2.42.

The sample 2 (white balls errors), of size n2=10 has a mean of 7.3 and a standard deviation of 2.41.

The difference between sample means is Md=-2.2.

$M_d=M_1-M_2=5.1-7.3=-2.2$

The estimated standard error of the difference between means is computed using the formula:

$s_{M_d}=\sqrt{\dfrac{\sigma_1^2+\sigma_2^2}{n}}=\sqrt{\dfrac{2.42^2+2.41^2}{10}}\\\\\\s_{M_d}=\sqrt{\dfrac{11.665}{10}}=\sqrt{1.166}=1.08$

Then, we can calculate the t-statistic as:

$t=\dfrac{M_d-(\mu_1-\mu_2)}{s_{M_d}}=\dfrac{-2.2-0}{1.08}=\dfrac{-2.2}{1.08}=-2.037$

The degrees of freedom for this test are:

$df=n_1+n_2-1=10+10-2=18$

This test is a left-tailed test, with 18 degrees of freedom and t=-2.037, so the P-value for this test is calculated as (using a t-table):

$P-value=P(t$

As the P-value (0.028) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that there are fewer errors on average when the yellow ball is used.

3 0

3 years ago

Arturiano [62]

The answer will be A. Bc you will multiply the |x| value with the given factor which is 2.

7 0

3 years ago