2x^2 - 11 = 87
2x^2 = 87 + 11 = 98
x^2 = 98/2 = 49
x = sqrt (49) = + or - 7
Answer:
2. trust me.. i did it before.
Find: 1) the area of a circle of diamter 5 feet and radius 5/2 feet.
2) the area of a triangle with height 4 ft and base 6 ft.
Add these 2 results together: pi*(5/2)^2 + (1/2)(6)(4) ft
The trick here is to recognize basic shapes, find their areas separately and add the results.
Answer:
circumfrence = 2 x pi x r
C = 2 x 3.14 x 3
C = 18.84 feet
Don't agree with Conclusion.
Mistake was he didn't multiply by pi (3.14)
Step-by-step explanation:
