for a minute i thought it was c. y = -3x + 2.
Capacity of tank in litres:
1x2x1.5=3m^3 or 3000 litres
Volume of concrete:
(0.1*1.5*1*2)+(0.1*1.5*2(0.1*2))*2)+(0.1*1.2*2.2)=0.3+0.66+0.264=1.224 m^3 of concrete
(Thickness x Depth x Width excluding the thickness of the wall x Two sides) + (Thickness x Depth x Length including the thickness of the wall on both sides x Two sides) + (Base slab dimensions)
Answer:
I say that d) is linear because I found the common difference of +2 in the y which makes the line of a graph straight.
And c) is non linear because there is no sequence so if you create a line out of this table, the line of a graph will not be straight.
A 
B denotes to all common elements in both A and B
- Sample space=S={1,2,3,4,5,6,7,8,9,10}
So
2 is common
Hence
A $\cap$ B={2}
A)
145 - 5d
5d = 145, set equal
29 days to lay all the track
b)
5*19 = 95
145-95 = 50
After 19 days, they have 50 miles to go.
