The answer is yes, it is a function.
Answer:
L = 20 cm, W = 10cm
Step-by-step explanation:
P=2L+2W
P=60,L=2W
60 = 2(2W)+2W
60=4W+2W
60=6W
W=10
plug in L=2W
L=2x10
L=20
Answer:
45 min
Step-by-step explanation:
Here,
the we take the work as W and Alan's speed as A and Zack's speed as Z.
A = 2Z
W = 30 ( A+Z)
if the time for Alan to done cleaning alone is t then t = W ÷ A
t = ( 30 (A+(A÷2)))÷ A
t = 45 min
I am done .
Multiply by 3 in the first equation and then you can cancel out the +3y and -3y to get the x answer. After that, you can do the same with the y by multiplying -2 in the first equation to cancel out the +2x and the -2x. Do you understand?
To solve for x you have to get x by itself. multiply both sides by 6. this will leave you with 12 = x
