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BARSIC [14]
3 years ago
14

Please help me! Find AC

Mathematics
1 answer:
oksian1 [2.3K]3 years ago
8 0
We are asked to find the length of AC, which measures 7x. Using the segment addition postulate, we can add the two given expressions for AB and BC and make it equal to the expression for AC. 
AB + BC=AC
5x+1+15=7x
5x+16=7x
16=2x
x=8
We've found the value of x, but we aren't done yet. We need to plug in the value we got for x into the expression for AC, which is 7x. Therefore, AC \Rightarrow7x\Rightarrow7(8)\Rightarrow\boxed{56}. Hope this helped and have a great day!
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