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 130, how many people attended the banquet? (Round to the
nearest whole number)

Answer 1

4 people were attending the banquet

Explanation:

1 - Rewrite

b = 75 + 15n; b = 130

2 - Plug in and get n alone

130 = 75 + 15n

- 75 -75

55 = 15n ←↓ Divide both sides by 15

55/15 = n

4
`3.6666... = n \\\4 = n`

Hope this helps