Two-thirds of the children in the fourth - grade class are girls. if there are 18 girls, what is the total number of children in the class?

For this case, the first thing to do is define a variable.

We have then:

Then we write the equation that models the problem:

From here, we clear the value of x.

We have then:

 the total number of children in the class is:

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

source

squares, rhombus, rectangles