Question

if RS=5x-7, ST= 2x=8 and RT= 2x-5. what is theperimeter of triangle RST? is it 51, 45, 57, or 47?

Answer 1

Is there a given value for x? Seems like there is missing information to solve this

Answer 2

there is no shown value for x. i got 9x+6 i just dont know how to reach the correct answer of 51.

Answer 3

angles r & t are congruent

Answer 4

ST = 2x ( plus or minus ) 8 ?

Answer 5

plus 8

Answer 6

how did you get 9x +6 ?? :o

Answer 7

by adding the segments together

Answer 8

\[\huge\rm 5x-7+2x +8 +2x -5 \cancel=9x +6\]

Answer 9

-7+8-5 =?

Answer 10

-4?

Answer 11

yes

Answer 12

since <R=<T, its an isoscles triangle with side RS=ST.

so
5x-7=2x+8
and you can solve for x.

then just plug this value to whatever expression you get when you add all three sides

Answer 13

how do i reach 51?

Answer 14

well. now you know the perimeter is 9x-4

and using that equation i gave you above, solve for x

Answer 15

oh okay i got it, thank you so much!

Answer 16

no problem!