A = 7
b = -18
c = -52
Do you know what the Quadratic formula is to solve?
Answer:Use a calculator
Explanation:it’s easier
Add all the times together:
10 + 25 + 15 = 50 minutes total.
For the ratio divide the time for weights by total time:
25/50 which reduces to 1/2
The ratio is 1/2
120 + 120 + X + X = 360
240 + 2X = 360
2X = 120
X = 60
M=2 or m=-3 hope this helps
