3 years ago

Three times the sum of a number and 12 is 45 plz help!

Mathematics

2 answers:

Norma-Jean [14]3 years ago

4 0

This can be written as 3(n+12)=45, where n is the unknown number

3(n+12)=45 <- Starting Equation

3n+36=45 <- Distributive Property

3n=9 <- Cancel 36 on both sides

n=3 <- Divide both sides by 3

So n=3

Hope this helped!

vredina [299]3 years ago

4 0

Answer:

Step-by-step explanation:

You might be interested in

Eli uses 1/4 pound of apples to make 4 servings of fruit salad. He uses the same amount of apples for each serving. What amount

DochEvi [55]

Answer:

1/16 pound

Step-by-step explanation:

1/4 ÷ 4 = 1/4 x 1/4 = 1/16

7 0

4 years ago

V. B What is 69 X 77 ?

Aloiza [94]

the answer is 5,313. you can use a calculator to find this quickly on your own. hope this helped.

3 0

3 years ago

Read 2 more answers

How do I complete the square?

zhannawk [14.2K]

You have to set them all equal to 0 and then factor it out.

6 0

4 years ago

A teacher wrote the following set of numbers on

Rama09 [41]

Answer:

Did you copy this down correctly?

Step-by-step explanation:

b = .125 which is rational

a is irrational because the square root of a prime number is irrational.

If c = 225....

then adding 2 rational numbers = rational sum

But adding (or multiplying) an irrational number to a rational number = irrational number.

6 0

3 years ago

A newsletter publisher believes that 64d% of their readers own a Rolls Royce. A testing firm believes this is inaccurate and per

fgiga [73]

Answer:

Step-by-step explanation:

The null hypothesis

$H_o:p=0.64$

The alternative hypothesis

$H_1:p \neq 0.64$

At 0.02 level of significance,

the testing firm rejects the null hypothesis.

This implies that the rejection of the null hypothesis shows that there is sufficient evidence to reject a newsletter publisher who believes that 64% of their readers own a Rolls Royce.

6 0

3 years ago