Answer:
Brand A
Step-by-step explanation:
Comment
The question is one of finding out what the unit cost is.
Brand A: $4.59 has a count of 40
Brand B: $3.99 has a count of 30
Brand A
unit = 4.59 / 40 = 0.115
<em>Rounded: 0.12</em>
Brand B
unit = 3.99 / 30 = 0.133
<em>rounded: 0.13</em>
Brand A even with proper rounding is the better buy
1. Note that

2. Then the equation
can be rewritten

3. Solve it:

Answer: x=6
<h3>
Answer: x = 18 (choice B)</h3>
===================================
Work Shown:
Through the inscribed angle theorem, we can say that 2 times the inscribed angle gets us the arc that the inscribed angle cuts off.
2*(inscribed angle) = arc measure
2*(2x+2) = 76
4x+4 = 76
4x+4-4 = 76-4 ... subtract 4 from both sides
4x = 72
4x/4 = 72/4 ... divide both sides by 4
x = 18
The amount of the markup is 20% of 25.15
EQUATION 1: 20/100 * 25.15
ANSWER TO EQUATION 1: 503/100
Then we have divide 503 and 100
EQUATION 2: 503/100
FINAL ANSWER: $5.03
The amount of the markup is $5.03