Answer: each pen costed him 2 dollars
Explanation: 24 - 10 = 14
14 / 7 = 2 $ per each pen
Answer:
A = 5.5t + 9
Step-by-step explanation:
We assume that the relationship between t and A is linear.
We have two points on a line: (2, 20) and (4, 31).
We now find the equation of the line.
A = mt + b
m = (31 - 20)/(4 - 2) = 11/2 = 5.5
20 = 5.5(2) + b
20 = 11 + b
b = 9
A = 5.5t + 9
Answer:

Step-by-step explanation:
Answer:
1/2
Step-by-step explanation: