2 years ago

F(-4) if f(x) =x to the power of 2 +8

Mathematics

1 answer:

Rufina [12.5K]2 years ago

7 0

10 :) I had this, EZ now :)

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N76 [4]

I can’t see it sorry maybe it’s my device

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3 years ago

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5/4 to 3/8 as a percent change

Digiron [165]

Well, what's the diffrence from 5/4 to 3/8?

$\bf \cfrac{5}{4}-\cfrac{3}{8}\qquad \stackrel{\textit{LCD is 8 clearly}}{\implies }\qquad \cfrac{10-3}{8}\implies \cfrac{7}{8}$

so, if we take 5/4 to be the 100%, what is 7/8 off of it in percentage anyway?

$\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
\frac{5}{4}&100\\\\
\frac{7}{8}&x
\end{array}\implies \cfrac{\quad \frac{5}{4}\quad }{\frac{7}{8}}=\cfrac{100}{x}\implies \cfrac{5}{4}\cdot \cfrac{8}{7}=\cfrac{100}{x}
\\\\\\
\cfrac{40}{28}=\cfrac{100}{x}\implies x=\cfrac{28\cdot 100}{40}$

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3 years ago

Claire is cycling at a speed of 12 miles per hour. Han is cycling at a speed of 8 miles per hour. If they start at the same posi

larisa [96]

Answer:

45 minutes is 3/4 of an hour, so find 3/4 of 12.

Divide 12 by 4 to get 1/4 of 12. That is 3.

3/4 is 3 of those, so multiply it by 3 to get 9.

So, she will have biked 9 miles.

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3 years ago

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