Answer:
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 - ([tex]\frac{3}{4}[/tex] + [tex]\frac{4}{7}[/tex])
1 - [tex]\frac{21 + 16}{28}[/tex]
1 - [tex]\frac{37}{28}[/tex]
1 - 1[tex]\frac{9}{28}[/tex]
= 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
