Answer:
3b -
b
Step-by-step explanation:
Let the number be "b"
So the expression would be:
3b -
b
I think A is 57.6 (1.2 times 2 and then times 24)
4 + 5 = 9
180 ÷ 9 = 20
Sand = 20×4 = 80
Cement = 20×5 = 100
Answer: 4/5
Step-by-step explanation:
To find the slope, solve for y
4x - 5y = -20
-5y = -4x - 20
y = 
The slope is the coefficient of x which is 
I think it's width= 3 times length
So the 1. length is 18/3=6
The 2. Width is 8*3=24
The 4. width is 12*3=36