The ratio of the number of pairs of pants Regina owns to the number of shirts she owns is 2:5. If she owns 4 pairs of pants, how many shirts does she own!

With #! i’ve tried to figure it out but i can’t.

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)