Factor 1 - 2.25x8.
(1.5 + x4)(1.5 - x4)
(1 + 1.5 x4)(1 - 1.5 x4)
(1 - 1.5 x4) 2

answer:  

123455421

step-by-step explanation: easy

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b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.