A) area = length x width = 12 x 6 = 72 sq.cm
B) area = 1/2x base x height = 1/2 x 3 x 6 = 9 sq.cm
C) same as B= 9 sq. Cm
D) subtract area of both triangles from area of rectangle:
72 - 9 -9 = 54 sq. Cm
3(4x-6)=2y
distribute
12x-18=2y
divide both sides by 2
6x-8=y
y=6x-8
64 + 2x = 180
2x = 116
x = 58
angle R equals 58 degrees
Yes it’s school p just mind the mean