This is for middle school 8th grade new question need help last one :)

Mathematics

1 answer:

hodyreva [135]2 years ago

6 0

Answer:

He Iransition 1 2 34 y= $ 50 -3.75 (x) y= $30 - 19.99 (x) 7

Step-by-step explanation:

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Solve the equation.

inysia [295]

The answer is x=-80.

First subtract 4 from both sides.

-6= $\frac{x}{8}$ +4

-6-4= $\frac{x}{8}$ +4-4

-10= $\frac{x}{8}$

Multiply 8 on both sides to isolate x.

-10·8= $\frac{x}{8*8}$

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uysha [10]

Answer:

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The surface area of the cone is 43.75pie cm^2. What is the slant height of the cone and the diameter is 5

Masteriza [31]

If the diameter of the cone is 5, then the radius of it will be half that, or 2.5, thus

$\bf \textit{total surface area of a cone}\\\\
SA=\pi r\stackrel{slant~height}{\sqrt{r^2+h^2}}+\pi r^2~~
\begin{cases}
r=radius\\
h=height\\
------\\
SA=43.75\pi \\
r=2.5
\end{cases}
\\\\\\
43.75\pi =\pi (2.5)\sqrt{r^2+h^2}+\pi (2.5)^2
\\\\\\
43.75\pi -\pi (2.5)^2=2.5\pi \sqrt{r^2+h^2}
\\\\\\
43.75\pi -6.25\pi =2.5\pi \sqrt{r^2+h^2}\implies 37.5\pi =2.5\pi \sqrt{r^2+h^2}
\\\\\\
\cfrac{37.5\pi }{2.5\pi }=\sqrt{r^2+h^2}\implies 15=\sqrt{r^2+h^2}$

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erma4kov [3.2K]

Answer:

22/24

Step-by-step explanation:

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