David can earn 400 dollars in 10 hours inflating balloons for kids. He wants to know how much he can earn if he spends 20 hours doing the same thing. Select all the equations from the below answer choices which can be used to find the answer.

What is the expression 8 (12x+4) equivalent to when x=20?

You have to pay $32.65 for an item after a 25% markup. What was the original price?

Comparison: Sara has three times as many pencil erasers as Sam together they have 28 erasers how many erasers does Sara have

Both Wilma's and Betty's pools hold 9000 gallons of water. If Wilma's garden hose fills at a rate of 750 gallons per hour while Betty's garden hose fills at a rate of 650 gallons per hour, how much longer does it take Betty to fill her pool than

A basket of laundry is being separated. Divide 48 pieces of clothing into 2 groups so the ratio is 1 to 3.

Which expression shows a way to find 2,813*7

O patrimônio que a contabilidade estuda e controla, registrando todas as ocorrências nele verificadas.

How do you solve an inequality

A bag contains 10 red marbles 15 green marbles and 15 blue marbles what is the probability that its a red marble

7.3 is what percent of 139?