Need help with math question attached.

QR = 22.4

Step-by-step explanation:

We would apply the law of Cosines which is expressed as

a² = b² + c² - 2abCosA

Where a,b and c are the length of each side of the triangle and A is the angle corresponding to a. Likening the expression to the given triangle, it becomes

QR² = RS² + QS² - 2(RS × QS)CosS

QR² = 35² + 40² - 2(35 × 40)Cos34

QR² = 1225 + 1600 - 2(1400)Cos34

QR² = 2825 - 2800 × 0.8290

QR² = 2825 - 2321.2

QR² = 503.8

QR = √503.8

QR = 22.4 to the nearest tenth

if x = 1, then the answer is 3.5

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