How many degrees has been rotated counterclockwise about the origin? A. 90 B. 360 C. 180 D. 270

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Factor the expression using the gcf. the expression 21m−49n factored using the gcf