Sarah bought a binder for $7.25 and 6 folders that totaled $9.05 how much did each folder cost

How is working backward similar to solving an equation?

Use your knowledge of the binary number system to write each binary number as a decimal number. a) 1001 base 2= base 10 b) 1101 base 2 = base 10

Astock has a 25% probability of increasing by $10 and a 75% probability of decreasing by $5. what is the stocks expected increase or decrease?