If x+y=15 and x-y=25, then what is the value of 2x^2 - y^2?
a) 425
b) 775
c) 825
d) 1,575
e) 1,625

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 ?

Sum is 17 and their difference is 3

Factor k2 - 17k + 16. a.(k - 2)(k - 8) b.(k - 1)(k + 16) c.(k - 1)(k - 16)