Question

Can someone help me please?
What is the perimeter of a triangle with the given side lengths?

s1 = x + 4 cm
s2 = 3x + 1 cm
s3 = 7x + 3 cm

Answer 1

to find the perimeter just add sides:
s1+s2+s3=x+4+3x+1+7x+3=combine like terms and simplify

Answer 2

oh! okay, is that it?

Answer 3

well you can combine x, 7x and 3x
and then combine 4, 1 and 3

what is x+7x+3x?

Answer 4

10x?

Answer 5

no

Answer 6

nearly

Answer 7

okay, can you tell me what i am doing wrong?

Answer 8

well, why you left x?
7x+3x+x=x*(7+3+1)=11x

Answer 9

ok so we have 11x now

Answer 10

ok

Answer 11

lets combine 4, 1 and 3 now
what is 4+1+3=?

Answer 12

8

Answer 13

yes

Answer 14

so the pertimeter is 11x+8

Answer 15

oh! i get it now!

Answer 16

:)

Answer 17

thanks!