Ms. hart is throwing an end of year celebration. there are 90 students. the 70 percent of 90 students that passed all 4 semesters of math will get pizza and ice cream. the 1/5 of the students that got perfect attendance will only get ice cream. the rest get candy.
how many students get pizza and ice cream and pizza?
how many students get candy?

63 percent get pizza and ice cream

18 percent only get ice cream

and 9 percent get candy

Step-by-step explanation:

.70*90=63

.2*90=18

63+18=81

90-81=9

63 students get pizza and ice cream

9 only get candy

.70 x 90=63 (pizza and ice cream)

1/5 x 90=18 (ice cream)

18+63=81

90-81=9 (candy)

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