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

There are 84 boats.

Step-by-step explanation:

Let be "x" the number of boats in the marina.

According to the exercise,   of the boats are white. This is:

You know that of the remaining boats are blue. This is:

And the rest of the boats are red and there are 9 of them.

Knowing this, you can write the following expression:

Finally, you must solve for "x":

c. 1,233 miles

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.