Hope it helps 20,30,900,1000
Answer:
x = -1
Step-by-step explanation:
Distribute by multiplying -5x by 2 and 4 by 2, leaving you with -10x+8+4-5=-3, then solve leaving you with x = -1.
Answer:

Step-by-step explanation:
Longest side of ∆ = 2a = 6.2 cm
If the shortest side is, a, and we are told that the longest side is twice the shortest side, therefore, length of shortest side is
The sum of the 3 sides = perimeter = 14.5 cm
Thus,

Plug in the values of a and b

The equation that can be used to find the side lengths is 
Answer:
Step-by-step explanation:
1. no-has decimal
2. yes, simplifies to -2
3. yes
4. yes
5. no-2.1
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)