In Problems 9 - 10, set up each problem algebraically and solve. Be sure to state what your variables represent.
9. The stopping distance (ds) of a car after the brakes are applied varies directly as the square of the
speed (v). If a car, traveling 100 km/h can stop in 90 m, how fast can a car go and still stop in 45 m?

30 people weigh 160 pounds or more

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)