Factoring i do not know how to factor

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

Ten members of balin's soccer team ran warm ups for practice. each member ran the same distance. their combined distance was 5/6 of a mile. to find the distance that each member ran, balin wrote the expression below.

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