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Answer: Choice B. f(x) = 100 - 68x</h3>
Work Shown:
Solve for y. Then replace y with f(x).
![680x + 10y - 1000 = 0\\\\10y - 1000 = -680x\\\\10y = -680x + 1000\\\\y = \frac{-680x + 1000}{10}\\\\y = \frac{-680x}{10} + \frac{1000}{10}\\\\y = -68x + 100\\\\y = 100 - 68x\\\\f(x) = 100 - 68x\\\\](https://tex.z-dn.net/?f=680x%20%2B%2010y%20-%201000%20%3D%200%5C%5C%5C%5C10y%20-%201000%20%3D%20-680x%5C%5C%5C%5C10y%20%3D%20-680x%20%2B%201000%5C%5C%5C%5Cy%20%3D%20%5Cfrac%7B-680x%20%2B%201000%7D%7B10%7D%5C%5C%5C%5Cy%20%3D%20%5Cfrac%7B-680x%7D%7B10%7D%20%2B%20%5Cfrac%7B1000%7D%7B10%7D%5C%5C%5C%5Cy%20%3D%20-68x%20%2B%20100%5C%5C%5C%5Cy%20%3D%20100%20-%2068x%5C%5C%5C%5Cf%28x%29%20%3D%20100%20-%2068x%5C%5C%5C%5C)
Effectively this involves adding 1000 to both sides and subtracting 680x from both sides, afterward we divide both sides by 10 to isolate y.
So, 100 * (49-37) / 37..You always do whats in parenthesis first; 49-37=12. Then you do multiplication and division, since multiplication comes first we do; 100*12=1200/37. Rounding to the nearest tenth would be 32%
Answer:
at t=0 the car has moved 0 feet, also you know it has a constant speed so you get the points:
P1:(0,0) therefore you know b, the y-intercept=0
P2:(8,840)
insert P2 into y=mx+b
840=8m+0
840/8=m
105=m
so the result is:
y=105x=105t=f(t)=d
Step-by-step explanation: