Como puedo pasar de un termino verbal a un termino algebraico?
problema: "la tercera parte de un número menos el cuádruple del mismo"
¿como paso eso a un término algebraico?

An astronaut drops a rock into a crater on the moon. the distance, d(t), in meters, the rock travels after t seconds can be modeled by the function d(t)0.82. what is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped?

With alll of except for the 2 that i did already

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?