Rita drove a total of 120 miles at 40 miles per hour. tom drove a total of 100 miles at 50 miles per hour. which explanation correctly describes a way to calculate the total number of hours rita and tom drove? a. step 1 divide: 120 ÷ 40 step 2 divide: 100 ÷ 50 step 3 add the two quotients. b. step 1 divide: 120 ÷ 40 step 2 divide: 100 ÷ 50 step 3 subtract the two quotients. c. step 1 add 120 + 40. step 2 add 100 + 50 step 3 divide the two sums by 2. d. step 1 subtract 120 – 40. step 2 subtract: 100 – 50. step 3 divide the two differences by 2.

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)