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3z-38

Step-by-step explanation:

Put an addition sign between the two equations and combine like terms. Write in order from highest degree to lowest (standard form). X's cancel out.

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168