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Marina CMI [18]
3 years ago
8

If B is the midpoint of AC and AC=8x-20 find BC

Mathematics
2 answers:
Degger [83]3 years ago
5 0

we are given

B is the midpoint of AC

so,

AB=BC

AC=AB+BC

AC=BC+BC

AC=2BC

now, we are given

AC=8x-20

so, we can plug it

8x-20=2BC

we can divide both sides by 2

and we get

BC=4x-10.............Answer

Elza [17]3 years ago
3 0

We know that AC=8x-20 and B is the mid-point of AC

⇒ AB = BC = \frac{AC}{2}

⇒ BC = \frac{8x-20}{2}

⇒ BC = 4x-10


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