53.35/11 = 4.85 for 1 key chain
4.85 *4 = 19.40
Answer:
The total money will be $113750(I think)
Just check other's answers.(or use a calculator.)
Suppose that some value, c, is a point of a local minimum point.
The theorem states that if a function f is differentiable at a point c of local extremum, then f'(c) = 0.
This implies that the function f is continuous over the given interval. So there must be some value h such that f(c + h) - f(c) >= 0, where h is some infinitesimally small quantity.
As h approaches 0 from the negative side, then:

As h approaches 0 from the positive side, then:

Thus, f'(c) = 0
Answer: $31.25
altogether she spends... 12.5×$4.50= $56.25
in total, she makes 5 beds ( 12.5÷2.5=5)
so she makes 5×$17.50= $87.50 from selling the beds.
however, $87.50-$56.25= $31.25
Answer:
Step-by-step explanation:
y = 2x + 30
y = 2(5) + 30
y = 10 + 30
y = 40
answer is a