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4 years ago

What is the value of the expression 3y by the power of 2 when y=-2 plzzz help

Mathematics

1 answer:

seraphim [82]4 years ago

5 0

(3y)^2

After substituting

(3×-2)^2
= (-6)^2
=(-6)×(-6)= 36

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A. 1 1/2 B.-3 3/8 C.3 3/8 D. -1 1/2

adell [148]

$\implies {\blue {\boxed {\boxed {\purple {\sf { \: A. \:1 \frac{1}{2} }}}}}}$

$\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}$

$- 2 \frac{1}{4} \div ( - 1 \frac{1}{2} )$

➼ $\: \frac{ - 9}{4} \div( \frac{ - 3}{2} )$

➼ $\: \frac{ - 9}{4} \times \frac{ - 2}{3}$

➼ $\: \frac{ - 9 \times - 2}{4 \times 3}$

➼ $\: \frac{18}{12}$

➼ $\: \frac{3}{2}$

➼ $\: 1 \frac{1}{2}$

$\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{.}}}}}$

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3 years ago

If 50 is 20% of a value, what is that value?

lukranit [14]

Divide 50 by 20%

50/20% = 50/0.20 = 250

Answer: 250

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3 years ago

Read 2 more answers

What is the length of AC ?

Lelechka [254]

Triangles ABC and CDE and similar with ABC being dilated larger. This means we can use ratios to help solve for x, and then solve fo AC.

$\frac{84}{156-x} = \frac{7}{x}$
$\frac{84x}{156-x} = 7$
$84x = 7(156 - x)$
$84x = 1092 - 7x$
$91x = 1092$
$x = 12$
So, from this problem we now know that x is equal to 12. We merely need to plug that into what is given for AC and solve for AC.
AC = 156 - 12
AC = 144
Therefore, A is equal to 144.

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3 years ago

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