Question

The legs of an isosceles triangle have lengths x+1 and -x+7. The base has length 3x-3. What is the length of the base?
a.6
b.6
c.3
d. cannot be determined
i need help i dont even know what to do

Answer 1

i think the answer is c not sure

Answer 2

y do u think its C.

Answer 3

because (3)+1=4 and (-3)+7= 4 am i wrong?

Answer 4

good You know the concept and yes it is C.

Answer 5

thanks.

Answer 6

no problem any time

Answer 7

well it says the length of the base

Answer 8

it is not asking for x

Answer 9

but you did find x

Answer 10

so that is a step in the right direction

Answer 11

so c is not the answer?

Answer 12

is x the length of the base or is 3x-3 the length of the base?

Answer 13

3x-3 is

Answer 14

so you already determined x

Answer 15

now to find the length of the base plug that into 3x-3

Answer 16

thats 9?

Answer 17

okay then oh yea I see

Answer 18

Equate x+1 to -x+7 and then solve the result for x.
x = 3
Replace x in the base length expression with 3 and evaluate the result, which is 6.

The answer is a. or b.

Answer 19

3(3)-3=?

Answer 20

but yea thats what i got now so... its D.?

Answer 21

9-3 isn't 9

Answer 22

that is 6

Answer 23

3(3)-3
9-3 <--since 3(3)=9
6

Answer 24

wait you put me off track what?

Answer 25

where did you get the three

Answer 26

you got the 3 remember?

Answer 27

you said x=3

Answer 28

oh right ok im back on

Answer 29

3x-3 the x was 4 from the other solutions? whwere are you getting the three?

Answer 30

-x+7=x+1
add x on both sides
7=2x+1
subtract 1 on both sides
6=2x
x=3
so the bottom (the base) the 3x-3 is 9 since 3(3)-3=9-3=6