680, 683, 685, 696, 703, 705, 714, 715, 722, 726, 726, 727, 728, 729, 730, 731, 732, 749, 754, 759, 760, 769, 769, 770, 772 mean
sinx+2cosx=1
2sinx-cosx=2
2a+4k=76
a+k=25
66+2/3%of 60kg
50÷100
9÷11620
78÷25 with solution
15/7-14/7
with solution
230x729?
factor the polynomial y=6x³+45x²+66x-45