12. If R is the midpoint of OS, find QS.
5x - 3
21 - X
R
0
i

Your answer is 4x + 18.

Step-by-step explanation:

QR = 5x - 3

RS = 21 - x

Now,

QS = QR + RS

= (5x - 3) + (21 - x)

= 5x - 3 + 21 - X

= 4x + 18 (Answer.)

34

Step-by-step explanation: if r is the midpoint then QR must be equale to RS

So the equation would be 5x-3=21-x

After solving this equation x=4

so you plug for instead of the x and for both QR and RS you get 17

so in order to dind QS you have to combine QR and RS

whuch means 17+17

and that equals to 34

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step-by-step explanation:

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step-by-step explanation:

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~courtney