Answer:
j
Step-by-step explanation:
The equation given is:
Using quadratic formula:
From the question:
a = 2, b = -4, c = 7
Therefore:
=>
2.5mph
S = Distance divided by Time (S = D/T)
Therefore.
S = 15/6
=2.5 mph
Colin walked an average speed of 2.5mph
Sara withdraw money for food 5 times