I need to know what 9 plus 10 is.

9 + 10 = 19

Step-by-step explanation:

Lets say you have 9 party guests. 10 more come to the party. Now you would have 19. (If it isn't 19 then 21)

Hope this helps.

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step-by-step explanation:

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i know the way

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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