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The original number, written as " T U ", has the value (10T + U). When you reverse the digits, the new number has the value (10U + T). Adding the two numbers: (10T + U) + (10U + T) = 55 11T + 11U = 11(T + U) = 55 T + U = 5 All possible two-digit numbers that satisfy (T + U = 5) are: 1423 32 41
55. Fit the cubic t(n) = n3 - 8n2 + 30n - 20
Since you already have the distance = 12 miles and rate = 55mph, you can us the equation : distance equals rate x time.d=rt12=55t, plug in numbers12/55=t, divide by 55 on both sidest=.218 hour or around 13 minutes.
"Percent" is the same as "of 100" so the answer is 5.5