Jeremy bought a new pair of jeans. The jeans regularly cost $30, but they are on sale for
10% off. There is a 6% sales tax on his
purchase. How much will Jeremy pay
altogether for the jeans ?

28.80

Step-by-step explanation:

10% of $45 = 0.10 × 45 = $4.50

$45-$4.50=$40.50  

90% of $45 = 0.90 × 45 = $40.50

average amount=mean.  middle number=median

Step-by-step explanation:

The mean is a type of average. It is the sum (total) of all the values in a set of data, such as numbers or measurements, divided by the number of values on the list. ... Then divide the sum by how many values there are. So if you have five values, add them all together, then divide the result by five. That is the mean.

The median is the middle number in a sorted, ascending or descending, list of numbers and can be more descriptive of that data set than the average. ... If there is an odd amount of numbers, the median value is the number that is in the middle, with the same amount of numbers below and above