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kipiarov [429]
3 years ago
15

In Triangle A B C, what is the value of x? Triangle A B C. Angle A is (10 x minus 10) degrees, angle B is (8 x) degrees, angle C

is (10 x + 8) degrees. 5.5 6.5 55 65

Mathematics
2 answers:
Jlenok [28]3 years ago
7 0

Answer:

x = 6.5

Step-by-step explanation:

In a triangle, the sum of the measures of the angles equals 180 deg.

8x + 10x - 10 + 10x + 8 = 180

28x -2 = 180

28x = 182

x = 6.5

mr_godi [17]3 years ago
4 0

Answer:

x = 6.5

Step-by-step explanation:

The sum of the angles of a triangle is 180

8x+ 10x-10 + 10x +8 = 180

Combine like terms

28x -2 = 180

Add 2 to each side

28x-2+2 = 180+2

28x=182

Divide by 28

28x/28 = 182/28

x =6.5

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17) x-8=11

18) 9-x=5

19) x+6=7

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Step-by-step explanation:

17) The difference between a number and 8 is 11

Let number = x

then the equation will be:

x-8=11

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x-8=11

x=11+8\\x=19

18) Nine less than a number is five.

Let number = x

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9-x=5

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9-x=5\\-x=5-9\\-x=-4\\x=4

19) Seven is equal to a number plus 6

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x+6=7\\x=7-6\\x=1

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Keywords: Algebraic Expressions

Learn more about Algebraic Expressions at:

  • brainly.com/question/1617787
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  • brainly.com/question/9720317

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