Ernesto tried to determine the solution for the system of equations using substitution. x-y=7 3x-27+8

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step-by-step explanati∵∵∴∴on:

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.

i think its doubled. let me know

step-by-step explanation: