In one grade of 150 students the ratio of boys to girls is 2:3. how many boys are in that grade?

The numbers of boys in one grade are 60 .

Step-by-step explanation:

As given

In one grade of 150 students .

The ratio of boys to girls is 2:3.

Let us assume that the scalar multiple of boys and girls be x.

Thus number of boys = 2x

Number of girls = 3x

Than the equations becomes

2x + 3x = 150

5x = 150

 x = 30

Thus number of boys = 2 × 30

 = 60

Therefore the numbers of boys in one grade are 60 .

Hope this helped

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

3x + 4y -25 =0 represents the amount of change sianna should recieve