Answer:
c=-x^2+5x
Step-by-step explanation:
Answer:(-1,-3)
Step-by-step explanation:Solve for the first variable in one of the equations, then substitute the result into the other equation.
Answer:
see below
Step-by-step explanation:
2d+21 ≤11
Subtract 21
2d+21-21 ≤11 -21
2d ≤-10
Divide by 2
2d/2 ≤-10/2
d≤-5