What is an expression for twice a number, increased by 5

What is the size of the matrix resulting from

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9