What is the side length of s on the square a=m²

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

Use the elimination method to solve the systems of equations. choose the correct ordered pair. 7x+4y=39

To prove that angle def = angle dgf by sas, what additional information is needed? def congruent to dgf dfe congruent to dfg de congruent to dg dg congruent to gf