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

(Solve and show your thinking with a tape diagram)

the 3rd option is right

step-by-step explanation:

details

step-by-step explanation:

s

step-by-step explanation:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is