x = 437.3 ft
The angle at the top of the triangle = 90° - 29° = 61°
Using the sine ratio in the right triangle
sin61° = =
Multiply both sides by 500
500 × sin61° = x, hence
x ≈ 437.3
Assuming the question is to simplify:
Add 3x and 2x on the left side
Add 3x and 2x on the right side
Move all terms containing x to the left side of the equation
Subtract 5x from both side
x cancel out
Moving the constant to the right side of the equation
There are 10 + 20 = 30 total students in the class.
Total marks for the class = 60 * 30 = 1800.
Total marks for the girls = 54 * 20 = 1080.
=> Total marks for the boys = 1800 - 1080 = 720.
Mean mark for the boys = 720 / 10 = 72.
Banana = 6, the rest is in the picture