If there are 8 marbles in a group , and 5 out of every 8 is red, than in six groups there would be 5, 10, 15, 20, 25, 30 red marbles.
This lists the group of 6 sets.
30 red marbles in 6 sets.
A whole hour or revolution is 60 minutes and 360° so the area of a sector is:
A/πr^2=α/360
A=απr^2/360...now we need to find the angle α/360=5/60, α=30° so:
A=30πr^2/360
A=πr^2/12 and r=11.25ft so
A=11.25^2*π/12
A≈33.13 ft^2
Something - 10 = 90 divided 3
something - 10 = 30
something = 30 + 10
something = 40
Answer:
D
Step-by-step explanation:
note that (f + g)(x) = f(x) + g(x) , thus
f(x) + g(x)
=
- 3 + 3x² + x - 6 ← collect like terms
= 3x² +
x - 9 → D