how to solve this story problem. Newton buys 4 gallons of gasoline. He pays $8.64. How much does 1 gallon of gasoline cost

$2.16 / gallon

Step-by-step explanation:

4 gallons were bought for $8.64

4 gallons = $8.64

1 gallon = ?

cross multiply and divide

$8.64 / 4 gallons = $2.16 per gallon

check:

$2.16 * 4 = $8.64

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.