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Help plzz! Can you please explain as well! Thank you!!

Help plzz! Can you please explain as well! Thank you!!-example-1
User Underrun
by
7.5k points

2 Answers

2 votes

Answer: 11

Explanation:

Since we know RT we can add RS and ST to equal RT.


(2x-9)+(x+2)=23\\

The parenthesizes are not necessary, but they help understand the parts of the equation.

We can remove the parenthesizes and then combine like terms.


3x-7=23\\

Now add 7 to both sides to isolate the 3x.


3x=30\\

Now divide by 3 to solve for x.


x = 10\\

Now that we have solved for x we need to plug it back into the RS expression to solve for that length.


2(10)-9=RS\\

Now solve.

RS = 11

User Konstantin Weitz
by
7.9k points
3 votes

Answer:

RS = 11

Explanation:

RS + ST = ST

2x-9 + x+2 = 23

Combine like terms

3x -7 =23

Add 7 to each side

3x-7+7 =23+7

3x= 30

Divide by 3

3x/3 = 30/3

x = 10

RS = 2x-9

= 2(10) -9

20-9

11

User Chaldaean
by
8.3k points

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