The answer is C.
∠STR = ∠SRQ = 90° (given) (A)
∠RST = ∠RSQ (common angle) (A)
By AA test for similarity,
∆STR is similar to ∆SRQ.
So first you would go 1+y=1 and the go 1+0=1
Answer:
5x+15=0
5x= -15
x= -15/5
x= -3
the solution of the equation is X= -3