29. EARNINGS Francesca bought $25 worth of face painting supplies. At a local fair, she charges $5 to paint a child's face. How many faces must she paint to earn $80? Solve
the equation by finding the zero of the related function.

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

p

step-by-step explanation:

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.