What is the sum of (-2.1×+3.7) and (5 + 4.9×)

Can someone me and plz do the problem

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 ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry