He is overestimating because 2.25 * 6 = 13.5, which is less than 11.5
No it is not a function because the 2 repeats and for it to be a function none of the x values can repeat.
The domains are -8, 0, 2, 2, 7 (when it asks for domain it is asking for the x values)
The ranges are 7, 1, -6, 3, 9 (when it asks for range it is asking for the y values)
Answer: the answer is c) $0.85
Step-by-step explanation:
if he has 3/20 of a dollar that calculates to $0.15 and $1.00 minus $0.15 equals $0.85
6.5 liters per 100 km travelled. 30% of 5 is 1.5, so adding this to the original amount results in 6.5