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Alla [95]
3 years ago
7

Solve for x and y...............​

Mathematics
2 answers:
sladkih [1.3K]3 years ago
7 0

Answer:

9. x=30, y=10\sqrt{3}

11. x=5\sqrt{3}, y=10\sqrt{3}

Step-by-step explanation:

9)

\sin x=\dfrac{10}{20}\\x=\sin^{-1}\left( \dfrac{1}{2} \right)=30^{\circ}\\y=\sqrt{20^2-10^2}=\sqrt{400-100}=\sqrt{300}=10\sqrt{3}

11)

\tan 60= \dfrac{15}{x}\\x=\dfrac{15}{\tan 60}=5\sqrt{3}\\y=\sqrt{(5\sqrt{3})^2+15^2}=\sqrt{75+225}=\sqrt{300}=10\sqrt{3}

Hope this helps!

storchak [24]3 years ago
7 0

Answer:

9 for x..................

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Suppose y varies directly with x. if y=-3 when x=5 find y when x=-1
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\\ \quad \\
\textit{we know that, when}
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solve for "k", to find the "constant of variation",
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now
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A point has the coordinates (0, k).
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5 0
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Harrison and Sherry are making decisions about their bank accounts Harrison wants to deposit $200 as a principal amount with an
AlekseyPX

Answer:

Sherry's Method of depositing $200 as a principal now with an interest at 4% compound at monthly will result in more money after two years.

Step-by-step explanation:

We use the Total Amount generated using compound interest formula to solve this question

Formula =

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