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Slav-nsk [51]
3 years ago
6

Solve for x. Round to the nearest tenth, if necessary.

Mathematics
1 answer:
Brilliant_brown [7]3 years ago
8 0

Answer:

x = 63.9

Step-by-step explanation:

We have:

\frac{QR}{sin35} = \frac{78}{sin90}

=> QR × sin90 = 78 × sin35

=> QR × sin90 = 44.7

=> QR = 44.7

But, we also have: x^{2} + QR^{2} = 78^{2} <=> x^{2} + 44.7^{2} = 78^{2} <=> x^{2} = 6084 - 1998.09

=> x^{2} = 4085.91

=> x = \sqrt{4085.91} = 63.9211.. = 63.9

<3 Have a nice day!!

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