Atotal of 17 cars and trucks get gasoline at the gas station. each car gets 8 gallons of gasoline. each truck gets 19 gallons of gasoline. the station sells 169 gallons of gasoline. how many cars were at the gas station? how many trucks were at the gas station?

There were 14 cars and 3 trucks at the gas station

Step-by-step explanation:

This problem can be modeled by a system of equations.

I am going to say that x is the number of cars at the gas station and y is the number of trucks at the gas station.

The problem states that there were a total of 17 cars and trucks get gasoline at the gas station. It means that x + y = 17.

The problem also states that each car gets 8 gallons of gasoline and each truck gets 19 gallons of gasoline, and that the station sells 169 gallons of gasoline. So 8x + 19y = 169.

So, we have a system with these following equations:

1) x + y = 17

2) 8x + 19y = 169

I am going to write x as a function of y in 1) and replace it in 2)

x = 17 - y

8(17 - y) + 19y = 169

11y = 169 - 136

11y = 33

y = 3

So, there were 3 trucks at the gas station.

From 1)

x = 17 - y

x = 17 - 3

x = 14

There were 14 cars at the gas station.

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

$649.60

step-by-step explanation: