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marusya05 [52]
3 years ago
10

The product of a number and -2/3 is -9/10 (20 Points) What is the number?

Mathematics
2 answers:
poizon [28]3 years ago
8 0

Answer:

\large\boxed{n=\dfrac{27}{20}}

Step-by-step explanation:

\text{Let}\ n\ \text{is a number.}\\\\\text{The product of a number and}\ -\dfrac{2}{3}\ \text{is}\ -\dfrac{9}{10}:\\\\-\dfrac{2}{3}\cdot n=-\dfrac{9}{10}\\\\-\dfrac{2n}{3}=-\dfrac{9}{10}\qquad\text{change the signs}\\\\\dfrac{2n}{3}=\dfrac{9}{10}\qquad\text{cross multiply}\\\\(2n)(10)=(3)(9)\\\\20n=27\qquad\text{divide both sides by 20}\\\\\dfrac{20n}{20}=\dfrac{27}{20}\\\\\boxed{n=\dfrac{27}{20}}

Lana71 [14]3 years ago
3 0

Answer:

1 7/20

Step-by-step explanation:

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Stells [14]

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3 years ago
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3 years ago
If f(x)=3(x+5) +4/x, what is f(a+2)​
tamaranim1 [39]

Answer:

f(a+2)=3(a+7)+4/(a+2)

Step-by-step explanation:

To determinef(a+2) you need to substitute a+2 for each occurrence of x in the given function. See below for full explanation.

Explanation:

If

f(x)=3(x+5)+4/x

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f(a+2)=3(a+2+5)+4/a+2

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5 0
3 years ago
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Nastasia [14]

Answer:

x = 9

Step-by-step explanation:

First equation = 4x - 8

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Seperate the equation with an equal sign to make it an equality equation and solve for X so :

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Solution:

x = 9

4 0
3 years ago
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