A + b= 7
a - b = 3

Plz help I'm confuse​

Rearrange the formula c^2 = a^2 + b^2 for b

Flashback to semester a. are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr? show your work.

The radical equation 2+√2x-3 = √x+7 has a solution set [x= a0} and an extraneous root x = a1.