Use the number line shown, where RS = 8 y + 4, ST = 5y + 7, and RT = 115. A. What is the value of y? B. Find RS and ST.

asked May 15, 2023 79.7k views

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Use the number line shown, where RS = 8 y + 4, ST = 5y + 7, and RT = 115.

A. What is the value of y?

B. Find RS and ST.

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Part A

$RS+ST=RT \\ \\ 8y+4+5y+7=115 \\ \\ 13y+11=115 \\ \\ 13y=104 \\ \\ y=8$

Part B

$RS=8(8)+4=68 \\ \\ ST=5(8)+7=47$

Stephen Young answered May 21, 2023

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