Step-by-step explanation:
C IS THE ANSWER!
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one expression using a variable for the unknown is... x = (3)(6/4)
First you need to convert then to the same units. So 3yd 1ft would be equal to 10 ft. Then you need to convert the feet to inches. 10ft x 12 is equal to 120 inches.
120 inches is greater that 100 inches.
Simplify the left side
4c+9=37
Move all terms NOT containing C to the right side of the equation
4c=28
Divide each term by 4 and simplify
28 divided by 4
Answer
C=7