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3 years ago

HELP WITH MY MATH EXAM i don't know what to do and my head hurts a lot

Mathematics

1 answer:

gogolik [260]3 years ago

8 0

Answer:

x = 154/13

Step-by-step explanation:

You are given the measures of all three angles in a triangle

so according to the Triangle Sum Theorem:

∠MNO + ∠OMN + ∠NOP = 180

1. Substitute the measures of the angles into the equation:

(3x + 11) + (2x + 20) + (8x - 5) = 180

2. Combine like terms:

(3x + 2x + 8x) + (11 + 20 -5) = 180

13x + 26 = 180

3. Isolate x by subtratcing 26 from both sides

13x + 26 -26 = 180 -26

13x = 154

4. Solve for x by dividing both sides by 13

13x/13 = 154/13

x = 154/13

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