For the expression: 12 - 7k + 9 - k What are the terms?
What are the like terms?
What are the coefficients?
What are the constants?
What is the expression simplified?

The terms are 12,7k,9,k ( terms are separated by either a plus or minus signs)

Like terms are 12 and 9, 7k and k

The coefficients are 7 and 1 ( these are numbers that come before a variable e.g 7k, so 7 is the coefficient of k.

The constants are the numbers which are not variables like 12 and 9

21 - 8k ( add or subtract the like terms only)

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The answer is 225 miles per 4.5 hours. hope this ; )