Answer:
x = 
Step-by-step explanation:
given, 50 - x^2 = 0
add x^2 to both sides, 50 = x^2
square root both sides,
= 
simplify, 50 / 5 = 10 / 5 = 2
you have a pair of 5's, and a 2,
= x
(60,58200) , (90,85200)
slope = (85200 - 58200) / (90 - 60) = 27,000/30 = 900
y = mx + b
slope(m) = 900
(60,58200)...x = 60 and y = 58200
sub and find b, the y int
58200 = 900(60) + b
58200 = 54000 + b
58200 - 54000 = b
4200 = b
ur equation is : C(x) = 900x + 4200 <== ur equation
9 and 1/2 is a mixed number