Question

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

Do you know what "perimeter" means?

Answer 2

of course lol

Answer 3

so where are you stuck?

Answer 4

you need to add all the given side together since u are solving for perimeter

Answer 5

s1+s2+s3

Answer 6

with the variables in the equation.. I dont understand why they are there and what they are doing

Answer 7

adding all the sides together you can find x which u would need to then substitute into each equation to find the perimeter

Answer 8

just add "like" items

e.g \[(x+2)+(2x-1)=x+2+2x-1=(x+2x)+(2-1)=3x+1\]

Answer 9

you just need to add the tree sides together and simplify

Answer 10

so
x+4+3x+1+7x+3
collect the like terms
x+3x+7x+4+1+3
then solve

Answer 11

@linzee1877 - do you understand?

Answer 12

yes exactly

Answer 13

yeah I think so

Answer 14

thank you all

Answer 15

think of it like adding different "types" of fuit together.

imagine the "x"'s were apples and the "constants" (i.e. the numbers on their own) were oranges.

if we said x+1+2x+3

you could think of it as 1apple plus 1 orange + 2 apples plus 3 oranges

so you have 3 apples and 4 oranges altogether (i.e. 3x + 4)

Answer 16

hope that helps :)

Answer 17

it does, thank you

Answer 18

yw :)