From these -Tx+y=S. If -T=Q/R, then y=-Qx/R+S, so Ry=-Qx+RS, Qx+Ry=RS=S.
If R is not equal to 1, or S is non-zero, the equations are inconsistent, so there would be no solutions.
If R=1 there are an infinite number of solutions given by Qx+y=S, or y=S-Qx or y=S+Tx.
If S=0, Qx+Ry=0 or y=-Qx/R or y=Tx.
Mean: 1 + 1 + 2 + 2 + 3 + 4 + 4 + 5 + 5 + 5 + 7 = 39/11 = 3.54.. rounded off = 3.5
Median: 4
Mode: 5
Answer:
The answer is $4.10
Step-by-step explanation:
You have to subtract 15.90 from 20
2 - 8y + 7y = 4
-1y = 2
y = -2
y = -2