Answer:
Step-by-step explanation:
b
A) w * L = 112
B) 2w + 2L = 44
A) w = 112 / L then substituting this into B)
B) 2 * (112/L) + 2L = 44
B) 224 / L + 2L = 44
B) 224 + 2L^2 = 44L
B) 2L^2 -44L +224 = 0
L = 14
L = 8
Double Check
Width = 14 Length = 8
2*14= 28 2*8 = 16
28 + 16 = 44
14*8= 112
Correct!!!
Answer:
B
Step-by-step explanation:
He's typing 40 words per minute.
110 words divided by 2.75 minutes.
40 x 4.25 minutes= 170
Y-x=3
2x+y=9
so solving by multiplying first by 2
so we get , 2y-2x=6
adding both eqn now,
3y=15
y=5
so x=2
so y=5 and x=2 !!
Just take the second slot which is -3
