there are 480 students in a class. the ratio of boys to girls is 1:3. How many students are girls in the class?

360

Step-by-step explanation:

3+1=4

480 divided by 4= 120

120x1=120 so there are 120 boys

120x3=360 so there are 360 girls

46.2+112.3

step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204