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2 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME :)

Mathematics

1 answer:

4vir4ik [10]2 years ago

6 0

No they are not equivalent.

When you multiply a number raised to an exponent to an identical number with an exponent you actually add the exponents together, not multiply them.

So x^3 * x^3 * x^3 would simplify to x^9

The second equation has a single value raised to exponents multiplied by each other so x^3*3*3 would simplify to x^27

X^9 is not the same as x^27

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2 years ago

Find the median. 90, 88, 100, 82, 80.<br> PLEASE

Ludmilka [50]

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3 years ago

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3 years ago

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If you add 21 to my number and then multiply the result by 3, you will get 84 more than two-thirds of my number. Find my number.

Ksivusya [100]

Based on the calculations, the unknown number is equal to $\frac{-45}{7}$

Let the unknown number be x.

<h3>How to find an unknown number:</h3>

Translate the word problem into an algebraic expression, we have;

Adding 21 to the unknown number:

$21 +x$

Multiplying the result by 3:

$3\times (21+x)$

84 more than two-thirds of the unknown number:

$\frac{2x}{3} +84$

Equating the equations, we have:

$3\times (21+x) = \frac{2x}{3} +84\\\\43+3x=\frac{2x}{3} +84$

Cross-multiplying, we have:

$43+3x=\frac{2x}{3} +84\\\\129+9x=2x+84\\\\9x-2x=84-129\\\\7x=-45\\\\x=\frac{-45}{7}$

Read more on word problems here: brainly.com/question/13170908

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2 years ago

Robin is 9 years younger than Geraldo. Geraldo is twice as old as Robin. How old is Robin?

dimaraw [331]

Answer:

Step-by-step explanation:

9*2= 18

18-9=9

because it said twice as old as Robin you multiply

Hope this helped you

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2 years ago