Try this explanation/solution:
a) the system which describes this situation is:

b) the solution of the system made up:

Answer:
9
Step-by-step explanation:
Given
p(x) = 5x² - 3x + 7 ← substitute x = 1
p(1) = 5(1)² - 3(1) + 7 = 5(1) - 3(1) + 7 = 5 - 3 + 7 = 9
Answer:
576
Step-by-step explanation:
calculator
Answer:
not really hehehehehe
Step-by-step explanation: