Which measure of central tendancy is found by calculating the sum of all data in the set divided by the number of data values in the set? median mean mode interquartile range

The graph below shows the price of different numbers of mats at a store: a graph is shown. the values on the x axis are 0, 2, 4, 6, 8, 10. the values on the y axis are 0, 21, 42, 63, 84, and 105. points are shown on ordered pairs 0, 0 and 2, 21 and 4, 42 and 6, 63 and 8, 84. these points are connected by a line. the label on the x axis is number of mats. the title on the y axis is price in dollars. which equation can be used to determine p, the cost of b mats?

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

What is the measure of angle x? 37° 82° x°