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Marianna [84]
2 years ago
15

What is the value of a?​

Mathematics
2 answers:
kirill [66]2 years ago
6 0

Answer:

3.

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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1 year ago
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The heights of the trees in a forest are normally distributed, with a mean of 25 meters and a standard deviation of 6 meters. Wh
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3 years ago
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