Question

The expression (1.2x + 4) represents the number of miles Angie jogged during a race, and 3x represents the number of miles that Tomas jogged during the same race, in x hours. Write an expression to show how many more miles Tomas jogged than Angie.

Answer 1

Answer:  1.8x - 4

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Explanation:

Subtract the two expressions

Tomas - Angie = (3x) - (1.2x+4) = 3x - 1.2x-4 = 1.8x-4

This represents how many more miles Tomas jogged compared to Angie.

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A more concrete example would be to say hypothetically

Tomas = 10 miles

Angie = 4 miles

So Tomas - Angie = 10-4 = 6 means he jogged 6 more miles than Angie.

That's why we subtracted. The order of subtraction matters. Saying 10-4 is different from 4-10.