21. BASEBALL CARDS Cristiano bought 24 baseball cards for $50. One type costs $1 per card, and the other cost $3 per card. Define the variables, write equations, and solve to find the number of each type of card he bought.

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212