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4 years ago

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What is x*x=15? (Basically make an equation that equals up to 15.)

1 answer:

rodikova [14]4 years ago

3 0

Answer:

$\displaystyle \sqrt{15} = x$

Step-by-step explanation:

Be VERY careful. When it write out the equation that way, it will give the speculation of this:

$\displaystyle 15 = x^2$

Now, in this case, since you were extra explanatory about this [what is written in parentheses], two factors I know of that multiply to 15 are these:

** $\displaystyle 15 = 2 \times 7\frac{1}{2}$

I am joyous to assist you at any time. ☺️

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Can you help me find the test statistic AND Pvalue for a hypothesis test. The question is: In a survey respondents were asked wo

vitfil [10]

Answer:

Test statistic z=0.65

P-value=0.52

Fail to reject the null hypothesis.

Step-by-step explanation:

Here we have to perform a hypothesis test on the difference of proportions. We may want to answer if there is significant difference in the proportions of male and females.

The null and alternative hypothesis are:

$H_0: \pi_1=\pi_2\\\\H_1: \pi_1\neq\pi_2$

The significance level is defined as 0.05.

The YES proportion for females is:

$p_1=33/98=0.337$

The YES proportion for males is:

$p_2=30/102=0.294$

The weighted average of p can be calculated as:

$p=\frac{n_1*p_1+n_2*p_2}{n_1+n_2}=\frac{33+30}{98+102}=0.315$

With this p, we estimate the standard deviation

$s=\sqrt{\frac{p(1-p)}{n_1}+\frac{p(1-p)}{n_2} }=\sqrt{\frac{0.315(1-0.315)}{98}+\frac{0.315(1-0.315)}{102} }=0.066$

The test statistic z can be calculated as:

$z=\frac{p_1-p_2}{s} =\frac{0.337-0.294}{0.066}=\frac{0.043}{0.066}=0.65$

We can calculate the p-value for z, taking into account is a two-sided test

$P(|z|>0.65)=0.52$

The P-value (0.52) is greater than the significance level (0.05), so the effect is not significant. It failed to reject the null hypothesis.

We have enough evidence to conclude that the proportions that vote YES are different between genres.

8 0

4 years ago

What is the difference between 216 and 125?

DochEvi [55]

The difference between 216 and 125 is 91

7 0

3 years ago

Read 2 more answers

NEED THE ANSWER ASAP PLEASE

charle [14.2K]

Answer:

144 degrees

Step-by-step explanation:

1 exterior angle = 360/number os side

= 360/10 = 36

interior angle = 180 - 36

= 144

6 0

4 years ago

Read 2 more answers

Lizzy is working two jobs to make money for a new car. She works 15 hours a week and earns 93$. She makes 5$ for each hour she b

kirill115 [55]

She worked 9 hours at baby-sitting and 6 hours at her parents store.

Step-by-step explanation:

Let,

Baby-sitting hours = x

Hours at parents store = y

Total hours = 15

Amount earned = $93

According to given statement;

x+y=15 Eqn 1

5x+8y=93 Eqn 2

Multiplying Eqn 1 by 5;

$5(x+y=15)\\5x+5y=75\ \ \ Eqn 3\\$

Subtracting Eqn 3 from Eqn 2;

$(5x+8y)-(5x+5y)=93-75\\5x+8y-5x-5y=18\\3y=18$

Dividing both sides by 3;

$\frac{3y}{3}=\frac{18}{3}\\y=6$

Putting y=6 in Eqn 1

$x+6=15\\x=15-6\\x=9$

She worked 9 hours at baby-sitting and 6 hours at her parents store.

Keywords: linear equations, subtraction

Learn more about linear equations at:

#LearnwithBrainly

6 0

3 years ago

What is the first step to solve the equation x^2-3=15

Otrada [13]

You will need to add 3 to each side.

x^2-3=15

+3 +3

x^2=12

and go from there

6 0

3 years ago

Read 2 more answers