Maggie's brother is 5 years younger than three times her age. the sum of their ages is 31. how old is maggie?

If 5 were added to the sum, it would be 4 times Maggies age.

Maggie is (31+5)/4 = 9 years old.

Let m represent Maggie's age. Then her brother's age is 3m-5, and the sum of their ages is ...

31 = m + (3m -5)

36 = 4m . . . . . . . simplify and add 5

9 = m . . . . . . . . . divide by 4

i think it would be c

mark brainliest if im right

step-by-step explanation:

363 square inches

step-by-step explanation:

surface area of a pyramid is b + 1/2ph

b is the area of the base: 11 x 11 = 121

p is the perimeter of the base: 11 + 11 + 11 + 11 = 44

h is the height of the pyramid: 11

121 + 1/2(44)(11)

121 + 242

363