On a certain hot summer's day, 391 people used the public swimming pool. the daily prices are $1.25 for children and $2.25 for adults. the receipts for admission totaled $752.75. how many children and how many adults swam at the public pool that day?

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)

2x=70  

x=70/2

x=35

thats the answer

step-by-step explanation: