Answer:
there are 25 students in the class and 15 who wear glasses.
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.
Answer:
1/3
Step-by-step explanation:
y2-y1/x2-x1
4-6/-1-5
-2/-6
1/3
20,000÷50=

The plane needs to descend at 400 ft per mile.
At 40 degrees?