How many gallons of gasoline are used in the united states ( population 318.9 million) in one
day?

- two cars for every three people,
- each car is driven an average of 10,000 miles per year, and
- the average car gets 20 miles per gallon

291.23 million gallons per day

Step-by-step explanation:

Let's break down the problem step by step and solve.

There are two cars for every three people. So we will multiply 2/3 with 318.9 (total population) to get the number of cars.

Number of cars = 2/3 * 318.9 = 212.6

Each car driven 10,000 miles per year. To get miles per day, we need to divide 10,000 by 365.

Miles driven per car per day = 10,000/365 = 2000/73

Since each car gets 20 miles per gallon, we can divide "2000/73" by 20 to get number of gallons per car per day.

Number of gallons per car per day = "2000/73" / "20" = 100/73

Now, since we know number of cars to be 212.6, we multiply this by number of gallons per car per day, which is 100/73. So:

100/73 * 212.6 = 291.23 gallons per day

Fraction = 4/7

Step by step Explanation

Let the denominator be x.

Numerator = 3 less than denominator

denominator = x

Numerator = (x – 3)

Now, Adding 5 to denominator

adding 2 to numerator.

Numerator = (x – 3 + 2)

Denominator = (x + 5)

(x – 3 + 2)/(x + 5)

According to the question

 (x – 3 + 2)/(x + 5) = 1/2

(x – 1)/(x + 5) = 1/2

2(x – 1) = 1(x + 5)

2x – 2 = x + 5

2x – x = 5 + 2

x = 7

So,

=> Denominator x = 7

=> Numerator (x – 3) => (7 – 3) = 4

= > Fraction = 4/7