Stephen buys x pencils and Y notebooks for his students. Each pencil costs $0.45 and each notebook costs $1.25 He buys a total of 210 pencils and notebooks for $142.50.
How many pencils does Stephen buy?

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

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?

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices