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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Fifteen less than twice a number is 21.<br> What is the missing number? |

Vikentia [17]

Answer:

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Step-by-step explanation:

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gizmo_the_mogwai [7]

Answer:

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Step-by-step explanation:

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