20=x+10
x=10 would be your answer
Please consider the complete question.
Michelle bought the same fabric on 3 different occasions and recorded the data below.
Yards of Fabric Total Cost
2.2 $2.53
3.6 $4.14
4.2 $4.83
What was the price per yard of fabric?
To find the cost per yard of fabric, we will divide cost of yards by number of yards.



Let us find cost per yard using 2nd set of data.


Similarly we will find cost per yard for 3rd set of data.


Therefore, the cost per yard of fabric is $1.15.
Answer:
Yes, the number 400 is a perfect square. A perfect square is a number that can be expressed as the product of two equal integers.
Step-by-step explanation: