How can the rule stating “a function can only have 1 output value” be correct when there are quadratic equations that when solved leave you with two X values? Such as the expression 2x^2+8x-8 = 0

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

i think it might be a but you might want a second opinion

5 feet of chain cost $9

so the answer is 1.80