The information for two pay as you go cell phone companies is given. on cell 3.5 hours: 10 dollars. talk time half an hour: 1 dollar and 25 cents. what is the unit rate in dollars per hour for each company ?

a

step-by-step explanation:

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option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,