Dimensions of a Circular Flower Garden A flower garden has the shape shown. The diameter of the outer circle is three times

the diameter of the inner circle. The lengths of the walkways are

8 feet long. What is the diameter of the inner circle?

8

ft-

20

Distance-Rate-Time Two cars travel the same distance. The first car travels at a

no because mercury has a density of 13.6 grams per centimeter squared while gold has 19.32 grams centimeter squared

step-by-step explanation:

answer: $1794

step-by-step explanation:

what chart am i supposed to follow?

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81