royaltyjl11
28.12.2019 •
Mathematics
The number of teams who entered in a 3-on-3 charity basketball tournament can be modeled by function t, where x is the number of years since the tournament first started.
t(x)=4x+24
the entry fee paid by each team to enter the tournament can be modeled by function f, where x is the number of years since the tournament first started.
f(x)=5x+45
which function, r, best represents the total entry fees collected in the xth year since the tournament first started?
a. r(x)=20x^2+300x+1,080
b. r(x)=9x+69
c. r(x)=9x^2+29x+69
d. r(x)=20x^2+1,080
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Ответ:
Option A:
Explanation:
The revenue, R(x) is the product of the number of teams who entered the tournament, T(x), times the entry fee paid by each team, F(x); then you can write:
Thus you must multiply the two functions (polynomials):
Use distributive property:
Simplify:
Add like terms:
Ответ: