Answer:
21 ÷ 1.4
Step-by-step explanation:
Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour.
The temperature had fallen 21 degrees, so it passed

hours after she had first checked the thermometer.
She had first checked the temperature at 3 p.m.
2x + 4y = 8
x + 2y = 3
3x + 6y = 11
A=Lw
P=2L+2w
216=Lw
W=216/L...substitute to Perimeter equation
60=2L+2(216/L)
60L=2L^2 + 432
2L^2-60L+432=0
2(L^2 - 30L + 216)=0
2(L-18)(L-12)=0
L=12, W=18 or L=18, W=12
The correct answer to this problem is
C=3
Y=3