Math help algebra ?..?

Question

Random survey was taken of tenth graders who owned pets. Fifteen tenth graders had a cat, 28 a dog, and8 had both a cat and a dog. How many tenth graders were polled?

Answer 1

27?

Answer 2

The correct answer is

15-8 = 7

28-8 - 20

20 + 7 + 8 = 35  

Answer 3

35

think about it like this

7 had just a cat

8 had both

20 had just a dog

20 + 8 + 7 = 35

Answer 4

7 had only cats,   20 had dogs only,   8 both cats and dogs

35 people

Answer 5

i am not going to give you the answer else you will start to rely on others to finish your homework but i will give you the hint

since 8 have both a cat and a dog

minus 8 from the 15 who has cat

then minus 8 again from the total of the 28 who has a dog

total up the remainder of both then add 8.

you will get the answer. goodluck

Answer 6

36

28+15-8

you subtract 8 because they were surveyed. :)

Answer 7

35

Answer 8

51

Answer 9

well dont you just add them up????

15 +28+8 = ???  calculator

Answer 10

15 + 28 + 8 = # of tenth graders