Express 236.7 miles in 4.5 days as a unit rate

The answer would be 52.6 miles per 1 day. Take 236.7 and divide it by 4.5.

Perform the operation in the choices to determine the coefficients of the terms.

(Addition)            -4x - 1 + 2x + 4    = -2x + 3
(Subtraction)       -4x - 1 - (2x + 4)  = -6x - 5
(Multiplication)    (-4x - 1)(2x + 4)   = -8x² -18x -4

Thus, the answer is multiplication as it gives a numerical coefficient equal to -18.