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NARA [144]
2 years ago
10

3) A is between B and C. If BC= 8x + 5, AB= 2x + 4, and AC= 3x + 7, then find AB

Mathematics
1 answer:
Yuliya22 [10]2 years ago
4 0

Answer:

AB = 8

Step-by-step explanation:

A is between B and C. If BC= 8x + 5, AB= 2x + 4, and AC= 3x + 7, then find AB

Step 1

Find x

BC = AB + AC

8x + 5 = 2x + 4 + 3x + 7

Collect like terms

8x - 2x - 3x = +4 + 7 - 5

3x = 6

x = 2

Step 2

Find AB

= AB= 2x + 4

AB = 2(2) + 4

AB = 4 + 4

AB = 8

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So the best way to do these is concentration1 (%) × volume1 = concentration2 × volume2
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100%×6 + 70%×v2 = 82%×(6+v2)
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