3 years ago

I want to know why D is the correct answer

Mathematics

2 answers:

sergeinik [125]3 years ago

5 0

Answer:

Cause it is

Step-by-step explanation:

ya know?

kvv77 [185]3 years ago

4 0

Answer:

It's B

Step-by-step explanation:

To find the surface area of a pyramid, you'll multiply L*W*H/3

810 divided by 3 is 405

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Solve the system using substitution y=2x+10 y=x+8

kvv77 [185]

Answer:

x = -2

Step-by-step explanation:

x+8 = 2x +10

-2x + x = 10-8

-x = 2

divide both side by -1

answer -- x = -2

8 0

3 years ago

Simplify each expression. Write your answers in exponential notation.

GenaCL600 [577]

$\bf ~~~~~~~~~~~~\textit{negative exponents}
\\\\
a^{-n} \implies \cfrac{1}{a^n}
\qquad \qquad
\cfrac{1}{a^n}\implies a^{-n}
\qquad \qquad
a^n\implies \cfrac{1}{a^{-n}}
\\\\[-0.35em]
\rule{34em}{0.25pt}\\\\
\left( \cfrac{36b^3}{9a^5} \right)^3\implies \left( \cfrac{4b^3}{a^5} \right)^3\implies \stackrel{\textit{distributing the exponent}}{\left(\cfrac{4^3b^{3\cdot 3}}{a^{5\cdot 3}}\right)}\implies \cfrac{64b^9}{a^{15}}$