Answer:
16 cm2
Step-by-step explanation:
By equa tion of area of triangle: S = 1/2 * height * base
Triangle B: 32 = 1/2 * 8 * x --> x = 8 (cm)
The base of triangle A is half of the base of triangle B so it is 4 cm.
The area of triangle A = 1/2 * 8 * 4 = 16 (cm2)
y=-2x+8 y=x-1
+2x +2x
y=8 y=3x-1
+1 +1
y=9 y=3x
/3 /3
3 x
therefore x=3