Someone please help will mark brainliest please explain

This table is a guess-and-check, which means that you input whatever number you think might work in this situation in “city gallons”

Step-by-step explanation:

After you just input that same number to wherever the “6” was in the first row...

E.g., if you put “7” for the next “city gallons”, then you’d put “10 - 7 = 3” in “freeway gal” and so on with ever different number you put in for “city gallons”.

That last part in the way bottom goes the same way! Except you input ”c” instead of a number, which is how you find the actual correct answer.

Hope this helps :)

answer: d. $20

step-by-step explanation:

just took the test

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.