What is the value of the expression 3x - (y/2 + 5)

When x=3.5 y=4

A 0.5
B 1.2
C 2.5
D 3.5

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

Solve 2^x=32 and rewrite this equation in a logarithmic form

Mario is constructing a frame for 10 in. by 8 in. photo. he wants the frame to be the same with all the way around in the same area of the frame and photo to be 120 square inches what is the dimension of the frame?