Helen has only $10 and $2 bills with her. If the total number of bills that she has is 7 and the amount of money with her is $30, then the number of $10 and $2 bills
are, respectively:
A 0 and 7
B 1 and 6
C 3 and 4
D 2 and 5

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

What can you determine about the solutions of this system

Which expression is rational? 6. , square root two, square root 14, square root 49