Answer:
A quarter can be called "un cuarto" or "veinticinco (25) centavos", where the second option is more common.
A dime is called "diez (10) centavos"
a penny can be called "un centavo"
a quarter and a dime: or "treinta y seis (36) centavos"
two quarters and four pennies: "cincuenta y cuatro (54) centavos"
three quarters and three pennies: "setenta y ocho (78) centavos"
nine dimes: "noventa (90) centavos"