The side lengths of a 45 - 45 - 90 triangle are in the ratio 1:1: (sqrt(2)) . What is cos 45 ?

Solve 2x+y=3 x+y=5 in substitution method

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)

Luke wants to reduce the area of his rectangular garden by 1/4 the expression 14/w can be used to represent this change. what is another way to write this expression?