At the start of the day there was £129.75 in the till. one hour later there is £145.50. how much money did the shop make in an hour?

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

The table shows the age and finish time of ten runners in a half marathon. identify the outlier in this data set. drag into the table the ordered pair of the outlier and a reason why that point is an outlier.

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0