5x - (x-2)>2x-4(x-8)
1 answer:
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Since all sectors have the same area, the spinner is equaly likely to land on each of them. There are:
- 3 yellow sectors
- 3 red sectors
- 4 green sectors
- 1 blue sector
Obviously, this implies that there are 11 sectors in total.
So, the spinner will land on a certain color with probability
Use this formula to deduce the probability of green.
Finally, you can multiply the probability of red by 11 to get the expected number of reds in 11 spins.
Answer:
x ≈ 8.9
Step-by-step explanation:
Given a tangent and a secant from an external point to the circle, the the square of the tangent is equal to the product of the external part of the secant and the entire secant, that is
x² = 8(8 + 2) = 8 × 10 = 80 ( take the square root of both sides )
x = ≈ 8.9 ( to the nearest tenth )