Solve for y given that this is a right triangle. Simplify answers completely. No decimals.

y = 4

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

y² = 8² + 4² = 64 + 16 = 80 ( take the square root of both sides )

y = = = 4 ← exact value

There are 2 terms. 7y is the first one and 3z is the second.