warren pays an entrance fee . of $8 at the county . He spends ).50 each time he rides the roller coaster. write an expression to show how much he spends at the fair if x= the number of ties he rides the roller coaster.

28

Step-by-step explanation:

Here is the complete question used in answering this question :

Three-fourths of the boats in the marina are white. 4/7 of the remaining boats are blue , and the rest are red . If there are 9red boats, how many boats are in the marina?

We first have to determine the fraction of the boats that are red

1 - ( + )

1 -

1 -

1 - 1

= 9/28

so, 9/28 of the boats are red

let b represent the total number of boats

9/28 x b = 9

to find b, divide both sides of the equation by 28/9

b = 28