$20.01
step-by-step explanation:
the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.
x^2 -12x + 36 + y^2 = 36
x^2 + y^2 = 12x
r^2 = 12rcos(theta)
r = 12 cos(theta)
where did you get them? if you picked from the grass, is is probably poisonous.