Generally, a person becomes an expert through a process of learning and then perfecting a technique through practice. In any particular area of achievement, there are many techniques that have to be learned, either through direct instruction or by watching others perform them. Once those techniques are learned, they must be practiced. Becoming an expert at all of the techniques, which can be rolled into a skill, requires a large amount of deliberate practice, practice where feedback and progress is carefully monitored. In general, 10,000 hours of deliberate practice is needed to become an expert, but there are levels of expertise that can be developed in less time.
Well first you would, subtract the gift certificate amount from the video game. Then you would subtract his total cash from the cost of the video game. The equation would look something like this: 45.50 - (59.95 - 15.25). The answer to your problem is yes he would have enough.
Answer choice C would be correct since both sides are increasing at a set rate, x is increasing by one while y is increasing by 2 every time. Hope this helps :)
