Iliana’s math grade increased from 65 to 86. Fiona’s math grade increased from 70 to 80. What is the difference, rounded to the nearest whole number, between the approximate percent increases? 10 percent
15 percent
18 percent
21 percent

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

In triangle opq right angled at p op=7cm, oq-pq=1 determine the values of sinq and cosq

Solve: 3x+y=6 4x-2y=18 show all work !