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2 years ago

B is the midpoint of AC. If AB = x + 5 and AC = 3x - 6, find BC.

Mathematics

2 answers:

Likurg_2 [28]2 years ago

8 0

Answer:

21 units

Step-by-step explanation:

Since B is the midpoint, we have:

AB = BC = AC/2

Substitute and solve for x:

x + 5 = (3x - 6)/2
3x - 6 = 2x + 10
3x - 2x = 10 + 6
x = 16

Find BC:

BC = AB = 16 + 5 = 21

Bas_tet [7]2 years ago

4 0

Hey there! I'm happy to help!

We see that at AB is halfway across our line. We see that AC is the total line.

So, to find the other half, we have to subtract AB from AC, which will give us the value of BC.

We first will subtract our x values.

3x-x=2x

And then we subtract our numbers.

-6-5=-11

So, BC is 2x-11.

Have a wonderful day and keep on learning! :D

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3 years ago

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Answer:

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Step-by-step explanation:

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6 0

3 years ago

I need help with this please

Alex

Answer:

650 cm²

Step-by-step explanation:

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Plug in the stuff: 2(5*9+9*20+5*20)=2(45+180+100)=2(325)=650 cm²

And there you go!

Please mark brainliest!

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3 years ago