The diagram shows a partly-filled petrol tank
a quarter of the tank is filled with petrol
1 cubic metre is equivalent to 1000 litres
work out how many more litres of petrol are needed to fill the tank
height =1.6m
width=2 m
length=1.3m

3120 litres

Step-by-step explanation:

1.6×2×1.3 = 4.16 m³

¼ is filled

1 - ¼ = ¾ is to be filled

¾ × 4.16 = 3.12m³

3.12×1000 = 3120 litres

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2