In the end of year history exam, the mean mark scored by the 30 students in form 11a was 55% and the mean mark scored by the 25 students in form 11b was 44%. What was the mean mark of all the students.

30 feet

step-by-step explanation:

that would be 2 1/2 * 12

= 24 + 6

= 30 feet   (answer)

just get this app called photo math it should be able to do those

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock

139 divided by a number

step-by-step explanation: