What is the value of x? will mark

C) x = 5√3

Step-by-step explanation:

This is a 30°-60°-90° triangle, which means that the sides opposite these angles have the relation of 1-√3-2.

Here, x is the 1, and 15 is the √3. That means that x/15 = 1/√3

Cross-multiply/Means-extremes: 15 = x√3

Divide: x = 15/√3

Simplify: x = (15√3)/3

Simplify: x = 5√3

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116