Which mathematical property is demonstrated? 5 + 3w + 2 = 5 + 2 + 3w associative property of multiplication commutative property of addition associative property of addition commutative property of multiplication

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

I’m really confused and need your assist me with this question i’ve never been taught

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)