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Tell whether the angles are complementary or supplementary. Then find the value of x.

Tell whether the angles are complementary or supplementary. Then find the value of-example-1

2 Answers

2 votes

the angles are complementary because they add up to 90° because of the red square. x=20

Explanation:

4x-5+15=90

4x+10=90 subtract 10 from each side

then you get left with 4x=80

divide 4 from each side then you get left with x=20 and to check just substitute 20 where x is so 4(20)-5= 80-5=75 +15=90.

User Albert Tugushev
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1 vote
It is complementary and value of x is 20
User Malsmith
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