Answer:
(10x - 4) + ( -7 + x)
10x-4-7+x=10x-11 is your answer
325.5*.15 = 48.825
325.5 - 48.825 = 276.68 (rounded)
Shaded area = Area of circle - 2(area of one triangle)
The circle has radius 5 cm, so its area is

The triangle has a base of 6 cm. Two of its legs coincide with the radius of the circle, which means the height of the triangle must be 5 - 1 = 4 cm. So one triangle's area would be

.
Shaded area =

.
Answer:
the last option
Step-by-step explanation: