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3 years ago

I need help with number 2.

Mathematics

1 answer:

Lisa [10]3 years ago

5 0

Answer:

(1)

Step-by-step explanation:

Given

$\frac{2x}{a}$ + b = c ( subtract b from both sides )

$\frac{2x}{a}$ = c - b ( multiply both sides by a to clear the fraction )

2x = a(c - b) ← distribute

2x = ac - ab ( divide both sides by 2 )

x = $\frac{ac-ab}{2}$ → (1)

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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}
\\\\\\
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4 years ago

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V125BC [204]

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4 years ago

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rjkz [21]

<h3>Answer: -0.196</h3>

======================================================

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