Billy saw 19 animals at grayson zoo in the morning. he saw 17 more animals after lunch how many animals did billy see in all

Antonia and carla have an equivalant percentage of green marbles in their bags of marbles. antonia has 4 green marbles and 16 total matbles. if carla has 10 green marbles , how many total marbles does carla have

Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).