Answer: 16cm
Step-by-step explanation:
l = 4w
2l + 2w = p
2(4w) + 2w = 40
8w + 2w = 40
10w = 40
w = 4 cm
l = 4w = 4(4) = 16cm
You are dividing a number (x) by three and then subtracting 1 like this. (x/3)-1
#3. Plugging the point (3,0) into any of the equations except the third one gives an invalid answer.
