Answer:
y = 24
Step-by-step explanation:
5/4y-18=y/2
Multiply by 4 on all sides to get rid of the fractions
4(5/4y-18)=4*y/2
5y - 72 =2y
Subtract 5y from each side
5y-5y - 72 =2y-5y
-72 = -3y
Divide by -3
-72/-3 = -3y/-3
24 =y
108 cm²
a. 0.35
b. -1.15
c. 0.056
d. -2.727
