All categories

4 years ago

What do you add to 45 to get 65

Mathematics

2 answers:

Degger [83]4 years ago

8 0

You will add 20 to 45 to get 65 because 45+20=65. So, your answer is 20.

kakasveta [241]4 years ago

3 0

The answer is 20.

+20

_____

65.

Hope this helps. c;

You might be interested in

0.25 as a simplified fraction

Umnica [9.8K]

1/4 because 0.25 is the same thing as 25/100. 25/100 simplified is 1/4

8 0

4 years ago

Find the P-value for a test of the claim that more than 60% of the people following a particular diet will experience increased

lina2011 [118]

Answer:

The p-value of the test is 0.0207.

Step-by-step explanation:

Test of the claim that more than 60% of the people following a particular diet will experience increased energy (H1: p > 0.6).

The null hypothesis is:

$H_0: p = 0.6$

The alternate hypothesis is:

$H_1: p > 0.6$

The test statistic is:

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

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.

0.6 is tested at the null hypothesis:

This means that $\mu = 0.6, \sigma = \sqrt{0.6*0.4}$

Of 100 randomly selected subjects who followed the diet, 70 noticed an increase in their energy level.

This means that $n = 100, X = \frac{70}{100} = 0.7$

Test statistic:

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

$z = \frac{0.7 - 0.6}{\frac{\\sqrt{0.6*0.4}}{\sqrt{100}}}$

$z = 2.04$

P-value of the test:

The p-value of the test is the probability of finding a sample proportion of at least 0.7, which is 1 subtracted by the p-value of z = 2.04.

Looking at the z-table, z = 2.04 has a p-value of 0.9793

1 - 0.9793 = 0.0207

The p-value of the test is 0.0207.

4 0

3 years ago

A polling agency conducted a survey by selecting 100 random samples, each consisting of 1,200 United States citizens. The citize

inn [45]

Answer:

Correct option (B).

Step-by-step explanation:

A 95% confidence interval for a population parameter implies that there is 0.95 probability that the population parameter is contained in that interval.

Or, if 100, 95% confidence intervals are created then 95 of those intervals would contain the population parameter with probability 0.95.

In this question the 95% confidence interval was created for population proportion of all United States citizens who were optimistic about the economy.

Then this 95% confidence interval implies that if 100 such confidence intervals were created then 95 of those would consist of the true proportion of US citizens who were optimistic about the economy..

Thus, the correct option is (B).

5 0

4 years ago

How do you write this equation x+5=2(7+x)

icang [17]

Answer:

x=−9

Step-by-step explanation:

Let's solve your equation step-by-step.

x+5=2(7+x)

Step 1: Simplify both sides of the equation.

x+5=2(7+x)

x+5=(2)(7)+(2)(x)(Distribute)

x+5=14+2x

x+5=2x+14

Step 2: Subtract 2x from both sides.

x+5−2x=2x+14−2x

−x+5=14

Step 3: Subtract 5 from both sides.

−x+5−5=14−5

−x=9

Step 4: Divide both sides by -1.

−x

−1

x=−9

Answer:

x=−9

HOPE I HELPED :)

-lvr

8 0

3 years ago

Jasmine's new kitten weighs 2 pounds

Nana76 [90]

The answer is 38 ounces

4 0

3 years ago

Read 2 more answers