The first one is 2x-3y/2
The second one is 1/x+2
The third one is (2x-5y)/(2x+5y)
The fourth one is x^2/z^2
FG=1.9 because since they are congruent Sr=FG
S=75° because they are congruent so G=75° so S=75°
Divide how many said they went to bed by how many she asked: 3/15=0.2. Multiply 0.2 by the number of angles in a circle: 0.2•360=72. 72 degrees is the answer :)