Mr. Manchego drove 243 miles in 4.5 hours before stopping for lunch. Then he drove 162 miles in 3 hours. What was Mr. Manchego’s rate of speed while driving?

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step-by-step explanation:

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6