Mike has coffee worth 4$ per pound that he wishes to mix with 20 pounds of coffee worth 7$ per pound to get a mixture that can be sold for 5$ per pound. How many pounds of the cheaper coffee should he use?

Frances left a 19% tip on a meal, including the tip, it's cost was $27.37. What was the cost of the meal before the tip?

Suppose that the revenue realized on the sale of a company's product can be modeled by the function r (x) = 600x-0.3x^2, where x is the number of units sold and r (x) is given in dollars.

Lee Middle School has 420 students Irene surveys a random sample of 45 students and finds that 18 of them have pet cats how many students are likely to have pet cats

Which fraction is equivalent to negative 2 over 3? a.) 2 over negative 3 b.) negative 3 over 2 c.) negative 2 over negative 3 d.) 2 over 3

What is the constant of variation for the inverse variation? xy = 8

Rahzel wants to determine how much gasoline he and his wife use in a month. He calculated that he used 78 1/3 gallons of gas last month. Rahzel's wife used 41 3/8 gallons of gas last month. How much total gas did Rahzel and his wife use last month.

To win the small county lottery, one must correctly select 3 numbers from 30 numbers. the order in which the selection is made does not matter. how many different selections are possible?

Naya Ironside is a Viking chieftain that is approaching the entrance of a river. The river is defended by guard towers on each riverbank.

Leonard solved this problem. Daryn paid $358.80 for shipping costs to ship 130 boxes for his company. How much did Daryn pay to ship each box? Leonard thought the answer was $2.76. Is Leonard's answer reasonable? A.

Which property can be used to remove parentheses in the expression 1.7 (x+9)