64.3k views
3 votes
Help! i dont get math tbh

Help! i dont get math tbh-example-1
User Atiyar
by
7.5k points

2 Answers

5 votes

Answer:

m<B = 48

Step-by-step explanation

believe me

User Mariowise
by
8.8k points
2 votes

Answer:

m<B=39°

Explanation:

First we need to find x.

One important thing you need to know to solve this question is that all the angles in a triangle add up to 180°. So :

m<A + m<B + m<C =180°

Let's sub in 90 for m<A since it's a right angle, and sub in the marked expressions for m<B and m<C respectively:

m<A + m<B + m<C =180°

90 + (2x+11) + (4x-5) =180

90+11-5 + 2x + 4x =180

96+6x=180

6x=84

x=14

No that we know x we can sub this into our expression for m<B to find the answer:

m<B=(2x+11)°

m<B=(2(14)+11)°

m<B=(28+11)°=39°

User Radoslav Yordanov
by
8.3k points

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