Please help! also show some work so i know its correct thanks!

Step-by-step explanation:

Diameter = 10 yards

r = 10/2 = 5 yards

Area of circle = πr²

                      = 3.14 * 5 * 5

                      = 78.5 yd²

y=3n + 1

step-by-step explanation:

this is wrong because it says the second number is one less and i added one instead

answer: -10

step-by-step explanation:

s(t) = 1 - 10t

s(x) = 1 - 10x

s(x + h) = 1 - 10(x + h)

            = 1 - 10x - 10h

s(x + h) - s(x) = 1 - 10x - 10h - (1 - 10x)

                      = 1 - 10x - 10h - 1 + 10x

                      = -10h

= -10