Mr. khans is buying staplers for his office. each stapler costs $16.99. write a function to represent the situation.

Step-by-step explanation:

Let x be the number of staplers and C(x) be total cost in dollars of x stapler.

Cost of each stapler = $16.99

So, the formula for total cost is

Total cost = Cost of each units × Number of units

Substitute 16.99 for Cost of each units and x for number of units in the above formula.

Total cost =

Total cost =

C(x) be total cost in dollars of x stapler. So, the cost function is

Therefore, the function C(x)=16.99x represents the given situation.

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!