Charlie builds decks for a living. He builds 14 standards decks in 3 weeks. How many decks can he build in 3 months (12- weeks)?

66 decks

Step-by-step explanation:

So 3 weeks and 14 decks, So then looked what can go Under the box. 12 is the next under weeks. I find what is equivalent to 12 (which is 4) and I know what to do to the next box. Under decks is 14. so 14 x 4=66

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180