X = the number of months the tire was used
y = the thickness of the tire tread
y = -(3/7)x + 20
Substitute x for 20 (the number of months the tire was used) and solve for y.
The next question: Substitute x for 49 (the number of months the tire was used) and solve for y.
i)
Pythagorean's theorem: √50
j)
Pythagorean's theorem: √1/2
Answer: x2 + 12x
Step-by-step explanation:
Answer:
x = 5/2,2
Step-by-step explanation: