What is the value of a?

Mathematics

2 answers:

kirill [66]2 years ago

6 0

Answer:

Step-by-step explanation:

12a+20a+28a=180(sum of interior angle of a triangle )

or, 60a=180

or, a= 180/60

therefore ..... a=3

Leno4ka [110]2 years ago

5 0

Answer:

A=60

Step-by-step explanation:

Add 28+20+12

A=60

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algol [13]

Answer:

Step-by-step explanation:

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SOLVE, SUBTRACT 2x

6=3x-9 THEN ADD 9

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2 years ago

Find m of ZX in circle P. 70 95 155 205

denis-greek [22]

The answer is C. 155

First find the measure of arc YZ.

The arc of WYZ is equal 180 degrees. So first add 25 to 85. Then subtract that to 180.

25+85=110

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2 years ago

Find the value of x by finishing solving the system shown below.

Andreas93 [3]

Answer:

x = 10

Step-by-step explanation:

Since both equations give y in terms of x, equate the right sides

3x - 28 = - 2x + 22 ( add 2x to both sides )

5x - 28 = 22 ( add 28 to both sides )

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