Answer:
-21
Step-by-step explanation:
by paying for 3 $7 dollar meals it would cost a total of 21 dollars.

notice, just like in any multiplication, you can simply multiply each term of either polynomial times the other, sum them up and then cancel like-terms.
Answer: C
Step-by-step explanation: The domain is all the x values the range is the y values
Metathod 1
4/5=27/x
mutiply 4/5 by 27/27 and multily 27/x by 4/4
108/135=108/4x
therefor
108:135=108:4x
therefor
135=4x
divide by 4
33.75=x
metahod 2
4/5=27/x
multiply oht sides by x
4/5x=27
multiply both sides by 5/4 to clear fraction
x=135/4
x=33.75