Raymond buys a buys, bought bottles of water at $2.10 each and a large pizza at $12.99. the total cost was $21.39. how many bottles of water b did he buy?

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.

The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?

The sum of the abscissa and the ordinate is six