Which of the following is a perfect square?

a. 115
b. 279
c. 169
d. 154

6(h+1)/2=a

a=area

step-by-step explanation:

its the same thing as a square or rectangle but after multiplying two sides you need to divide it by two.

the answer is d

for problems like this theres an app, its photomath that explains the problem and gives the answer hope i

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !