Delilah and Spence wanted a deck built onto their house. They wanted the deck to be a five sided shape with each side being 12 feet long. What is the perimeter of the deck?

60 feet

Step-by-step explanation:

Each side is 12 feet long and there are 5 sides. So to find the perimeter you add 12 together 5 times. 12+12+12+12+12 or multiply 12*5. Both equal 60 feet.

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3