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3 years ago

How do you solve how to make a ten to solve 13-7?

Mathematics

1 answer:

Valentin [98]3 years ago

5 0

13 - 7 = (10 + 3) - 7 = (10 - 7) + 3 = 3 + 3 = 6

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Manuela solved the equation below. What is the solution to Manuela’s equation?

BabaBlast [244]

For this case we have the following equation:

$2 (x + 2) = x-4$

Applying distributive property to the terms within the parentheses on the left side of the equation we have:

$2x + 4 = x-4$

Subtracting "x" on both sides of the equation we have:

$2x-x + 4 = -4\\x + 4 = -4$

Subtracting 4 on both sides of the equation we have:

$x = -4-4\\x = -8$

Answer:

$x = -8$

6 0

4 years ago

Read 2 more answers

A researcher surveyed 150 high school students and found that 68% played a musical insturment. What would be a reasonable range

maria [59]

Answer:

The reasonable range for the population mean is (61%, 75%).

Step-by-step explanation:

The interval estimate of a population parameter is an interval of values that consist of the values within which the true value of the parameter lies with a certain probability.

The mean of the sampling distribution of sample proportion is, $\hat p$ .

One of the best interval estimate of population proportion is the 95% confidence interval for proportion,

$CI=\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

Given:

n = 150

$\hat p$ = 0.68

The critical value of z for 95% confidence level is:

$z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96$

Compute the 95% confidence interval for proportion as follows:

$CI=\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

$=0.68\pm1.96\sqrt{\frac{0.68(1-0.68)}{150}}\\\\=0.68\pm 0.0747\\\\=(0.6053, 0.7547)\\\\\approx (0.61, 0.75)$

Thus, the reasonable range for the population mean is (61%, 75%).

5 0

4 years ago

Adam's music playlist contains songs he bought and songs his mother bought. The ratio of his songs to his mother's songs is 5:3.

vladimir2022 [97]

Answer:

The ratio of the songs is 5:3

Step-by-step explanation:

This means that for every 5 songs Adam has, his mother has 3. We can do that in intervals of 5:3, with 10:6, 15:9, 20:12, and etc.

6 0

3 years ago

Find the angle measure to the nearest degree. sln(B)=0.4848

algol [13]

B equals 29 degrees

7 0

4 years ago

What is the measure of DC? 1. 61 2. 119 3. 122 4. 360

Pie

Answer:

61 it is because it is in first

4 0

3 years ago