3 years ago

What is BC? Enter your answer in the box _units

Mathematics

1 answer:

laiz [17]3 years ago

3 0

Answer:

Step-by-step explanation:

It's an isosceles triangle (congruent angles ∠C ≅ ∠B).

Therefore AC = AB.

We have the equation:

$4x+1=2x+23$ <em>subtract 1 from both sides</em>

$4x=2x+22$ <em>subtract 2x from both sides</em>

$2x=22$ <em>divide both sides by 2</em>

$x=11$

Substitute the value of <em>x</em> to the expression BC = 3x - 8:

$BC = 3(11) - 8=33-8=25$

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−4(3m−3)+(−10+8m)=?

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answer: 20m+11

*note negative times a negative equals positive and negative times positive is negative
first: you multiply -4 by 3m which is -12m.
second: you multiply -4 by -3 which is +12
third: find the invisible which is 1. (located right here: +(1) (-10+8m)
fourth: multiply invisible 1 by -10 which is -10
fifth: multiply invisible one by +8m which is +8m
sixth: combine like terms
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Answer:

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Step-by-step explanation: