PLZ HELP! MY teacher is no help and I have no idea how this works.

Mathematics

1 answer:

Rainbow [258]4 years ago

3 0

Answer: find x

Tan(30)=20/x

X= 20/ tan(30)

Tan(30) =0.577

X= 20/ 0.577

X=34.66

Find Y

Sin(30)=20/y

Y=20/sin(30)

Sin(30)=0.5

Y=40

Step-by-step explanation:

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Answer:

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3 years ago

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7 divided by somethings equal 7.35

Dmitriy789 [7]

Let's translate it into an equation and then solve...

7/x = 7.35
x * 7/x = 7.35 * x
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3 years ago

The length of a rectangle is 59 inches greater than twice the width. If the diagonal is 2 inches more than the length, find the

Paul [167]

So.. hmm notice the picture here

we know the length is 59 more than twice the width,
twice the width, 2 * w, or 2w
59 more than that
2w + 59

we also know that, whatever that is, the diagonal of it is,
2 more inches than that, or
(2w + 59) + 2

now.. use the pythagorean theorem
$\bf c^2=a^2+b^2\implies \qquad 
\begin{cases}
a=2w+59\\
b=w\\
c=(2w+59)+2\to 2w+61
\end{cases}
\\\\\\
(2w+61)^2=(2w+59)^2+(w)^2
\\ \qquad\qquad \uparrow\qquad \qquad\qquad \qquad \uparrow \\
\textit{expand using binomial theorem, or FOIL}$

you'd end up with a quadratic, after simplifying, solve for "w"