Question

The cost of a banquet can be calculated using the function

b=75+15n where b represents the total cost and n represents
the number of people attending. If the total cost of the
banquet is 122, how many people attended the banquet?
(Round to the nearest whole number)

Answer 1

3 people attended the banquet

Explanation:

The function is given as:

b = 75 + 15n where

b represents the total = 122

n represents the number of people attending = ??

If the total cost of the banquet is 122, how many people attended the banquet?

Hence,

122 = 75 + 15n

122 - 75 = 15n

47 = 15n

Divide both sides by 15

n = 47/15

n = 3.1333333333

Approximately to the nearest whole number = 3

Therefore, 3 people attended the banquet.