For either one of the deals, just find what one card equals and times it by how many cards the other equation has.
e.g. 0.35 cents divide by 10 = 0.035. And now, you times it by 12 since the other deal is 12 cards for 40 cents.
0.035 x 12 = 0.48
So, 10 cards for 35 cents is not the better deal.
SOLUTION
A triangle has three sides. The sides of this triangle are 7 inches, 5inches and the unknown side.
Let the unknown side be x inches.
Perimeter is distance around a plane shape.
The perimeter of this triangle is 19,

Therefore, the other side is 7 inches
A gyre is best defined as a ring or circle.
(6;2)
6 - x coordinate, 2 - y coordinate.
6 > 0, then we need to move right 6 points. 2 > 0, than we need to move up 2 points
Answer: Start at the origin. Move 6 units to the right, then move 2 units up.