The time t taken to buy fuel at a petrol station varies directly as the number of vehicles v on queue and jointly varies inversely as the number of pumps p available in the station. In a station station with 5 pumps, it took 10 minutes to fuel 20 vehicles. Find: i) the relationship between t, p and v; ii)the time it will take to fuel 50 vehicles in the station with 2 pumps; iii) The number of pumps required to fuel 40 vehicles in 20 minutes.​

answer: this doesnt make any sense especially the photo.

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

you need to give us more information since we can't answer

add a pic of the graph, then ill edit this "answer" and solve it for you : 3

step-by-step explanation: