3 years ago

Evaluate the expression. 4(5+6)−15

Mathematics

1 answer:

satela [25.4K]3 years ago

6 0

Answer:

Step-by-step explanation:

distributive property

4(5+6)-15

20+24 - 15

PEMDAS

44-15=

You might be interested in

SOLVE <br> <img src="https://tex.z-dn.net/?f=%5Cfrac%7B12%7D%7B-4%7D" id="TexFormula1" title="\frac{12}{-4}" alt="\frac{12}{-4}"

ivanzaharov [21]

Answer: 12/-4= -3. -12/4=-3. -(12/4)= -3

Step-by-step explanation: All equal -3 just divide all of them to get the answer.

7 0

3 years ago

Read 2 more answers

Find the sample size required to achieve the given margin of error with SD = 51.02 and z - score = 1.96. Round your answer to th

coldgirl [10]

Answer:

The sample size required is 2500.

Step-by-step explanation:

z-score:

In function of the margin of error M, the z-score is given by:

$Z = \frac{M}{\frac{\sigma}{\sqrt{n}}} = \frac{M\sqrt{n}}{\sigma}$

In this question, we have that:

$\sigma = 51.02, M = 2, Z = 1.96$

$Z = \frac{M\sqrt{n}}{\sigma}$

$1.96 = \frac{2\sqrt{n}}{51.02}$

$2\sqrt{n} = 51.02*1.96$

$\sqrt{n} = \frac{51.02*1.96}{2}$

$(\sqrt{n})^2 = (\frac{51.02*1.96}{2})^2$

$n = 2500$

The sample size required is 2500.

3 0

3 years ago

Identify the correct binder for each paint.

yan [13]

Answer:

egg yolk

Step-by-step explanation:

3 0

3 years ago

Have to find volume and surface area but idk how

Setler [38]

Answer:

volume 1050 $in^{3}$

surface area 859 $in^{2}$

Step-by-step explanation:

volume is length times width times height (7*25*12)/2

surface area is area of all the sides added together

2(25*12)+(12*7)+ 2( $\frac{7*25}{2}$ )

4 0

3 years ago

Read 2 more answers

Adison earned $25 mowing her neighbor's lawn. Then she loaned her friend $13 and got $50 from her grandma for her birthday. She

andreev551 [17]

She started off with 24

8 0

3 years ago