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2 years ago

AB = x - 10, BC = x + 2, and AC = 28. Find BC.Please help!

Mathematics

2 answers:

aliina [53]2 years ago

7 0

Answer:

BC = 20

Step-by-step explanation:

Since line segment AC = 28, that means line segment AB and line segment BC must add up to 28:

x - 10 + x + 2 = 28

2x - 8 = 28

2x = 36

x = 18

Now we plug in <em>x</em> into segment BC's equation to find length of BC:

BC = x + 2

BC = 18 + 2

BC = 20

Leno4ka [110]2 years ago

6 0

Answer:

BC = 20

Step-by-step explanation:

AC = AB + BC

28 = x-10 + x+2

Combine like terms

28 = 2x -8

Add 8 to each side

28+8 = 2x-8+8

36 = 2x

Divide by 2

36/2 = 2x/2

18 =x

We want to find BC

BC = x+2

=18+2

=20

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