All categories

3 years ago

How do you divide -5.2 by 3.9? (step by step) please my test is tomorrow

1 answer:

3 0

I would suggest converting to fractions. -5.2 is equal to -52/10, and 3.9 is equal to 39/10. To divide -52/10 by 39/10, multiply -52/10 by the reciprocal of 39/10 (which is 10/39).
So you would set this up like:
-52 10
----- x ----- =
10 39

cancel out the 10s. just divide-52 by 39, and you have your answer.
or divide 52 by 39, just know that the answer will be negative.
52/39=1.33, or 4/3, or 1 1/3.

You might be interested in

What is the solution to this equation<br>x+8=-3

melisa1 [442]

Answer:

x+8=-3.

x=-3-8.

x= -11.

4 0

2 years ago

Read 2 more answers

Joe has 80 stamps. 1/4 of the stamps are state stamps. How many state stamps does he have

Hitman42 [59]

Answer:

80/4

Step-by-step explanation:

You do $\frac{80}{1} =\frac{1}{4}$ which is 80/4

8 0

2 years ago

Why is the percent increase from 45 to 75 not equal to the percent decrease from 75 to 45? Select three options

Korvikt [17]

Answer:

where are the three options

Step-by-step explanation:

6 0

2 years ago

Please correct this if I am wrong. If not then tell me if I’m right or not.

timofeeve [1]

Answer:

You are correct. Nice job

6 0

2 years ago

Use the sample data and confidence level given below to complete parts (a) through (d). A drug is used to help prevent blood c

Alla [95]

Answer:

a) $\hat p=\frac{148}{4167}=0.036$

b) $0.0355 - 1.96\sqrt{\frac{0.036(1-0.036)}{4167}}=0.030$

$0.0355 + 1.96\sqrt{\frac{0.036(1-0.036)}{4167}}=0.041$

Step-by-step explanation:

The sample proportion have the following distribution

$\hat p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Part a

The estimated proportion for this case can be calculated like this:

$\hat p=\frac{148}{4167}=0.036$

Part b

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by:

$z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96$

The confidence interval for the mean is given by the following formula:

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

Replacing we got:

$0.0355 - 1.96\sqrt{\frac{0.036(1-0.036)}{4167}}=0.030$

$0.0355 + 1.96\sqrt{\frac{0.036(1-0.036)}{4167}}=0.041$

8 0

2 years ago