At the same theater, a 16-ounce soda costs $3 and a 32-ounce soda costs $5. if the theater sells 12,480 ounces of soda for $2100, how many people bought soda?

540 people bought soda

Step-by-step explanation:

Let

x ----> the number of a 16-ounce soda

y ----> the number of a 32-ounce soda

we know that

----> equation A

----> equation B

Solve the system by graphing

The solution is the intersection point both graphs

The solution is the point (300,240)

see the attached figure

therefore

300+240=540

540 people bought soda

lo.lll

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!