Maryam is making a picture frame. if she uses 1.35 feet pieces of wood, and she needs 4 pieces to make the frame , how much wood will she needs? write numerical expression then solve .

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