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Zolol [24]
3 years ago
12

Simplify the expression: –3(n − 5)

Mathematics
2 answers:
disa [49]3 years ago
6 0
Because of the minus sign 3 becomes -3

The answer is -3

n-5 evaluates to n-5

Multiply -3 by n-5

we multiply -3 by each term in n-5 term by term.

This is the distributive property of multiplication.

Multiply -3 and n

Multiply 1 and n

The n just gets copied along.
marusya05 [52]3 years ago
3 0

Answer:

-35+7u

Step-by-step explanation:

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If a = 12 and 120% of a is equal to 80\% of bthen what is a + b ?
Novosadov [1.4K]

Answer:

The answer is 30

Step-by-step explanation:

First you have to find 120% of a (12).

\frac{12}{1}  \times  \frac{120}{100}  = 14.4

Therefore; 14.4 is 80% of b, and we are trying to find 100% of b

14.4 = 80\% \\ x = 100\%

we do not know what is 100% therefore we call it *x*. In order to find this unknown value *x* we cross multiply.

14.4 \times 100\% = 80\% \times x

This is the same as saying;

14.4  \times 1 = x \times  \frac{4}{5}

100% percent would be 1 because it is the whole number we are trying to find. The 80% would be 4/5. To get 4/5 you can simply break down 80/100 ( this is 80% as a fraction).

so the new equation is: 14.4= 4/5x

We divide both sides by 4/5. Then we will get x tobe equal to 18. Therefore b is 18. We were asked to find (a + b) so.<em> </em><em>1</em><em>8</em><em>+</em><em>1</em><em>2</em><em> </em><em>=</em><em> </em><em>30</em>

4 0
1 year ago
Find the exact value of the following.
qwelly [4]
The answer is going to be  11.98. hope that helped
3 0
3 years ago
What if the sample size used was some unspecified value larger than 30. Describe how this change in sample size would have affec
arlik [135]

Answer:

Option D is correct.

Decreases.

6 0
3 years ago
Please help me figure this out
Gnom [1K]

Answer:

True          

(1) You can prove two triangles are similar using AA similarity.

(2)If side length of similar figure have ration \frac{m}{n} then the ratio of surface areas will be:\frac{m^2}{n^2}

(3)If side length of similar figure have ratio of \frac{2}{3} then perimeter will have ratio:\frac{2}{3}.

False:

(1)If side length of similar figure have ration \frac{m}{n} then the ratio of Volumes will be:\frac{m^3}{n^3}

(2)If side length of similar figure have ration \frac{m}{n} then the ratio of surface area  will be:2\frac{m}{n}

4 0
3 years ago
PLZZZ HELPPP
Whitepunk [10]

Answer:

D. Domain: 2 > -11

Range: All real numbers

Step-by-step explanation:

Correct me if I’m wrong UwU

8 0
2 years ago
Read 2 more answers
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