You need to mix a solution that is 70% anti-freeze with one that is 30% anti-freeze to obtain 20 L of a mixture that 60% anti-freeze. How many liters of each of the solutions must be used?

think about a loss of 0.2 and gain of 7.5. explain how you know whether the result should be represented as a positive or a negative.

Explain why the absolute value of a number will never be negative

Write the number which is half as big as b

How long will it take for $4,500 to grow to $10,000 if it is invested in an account paying 3.25% interest per year compounded annually?

1 - 3.6x = - 17 - 8.1x

Herb knows the volume of a cone is one third that of a cylinder with the same base and height. He reasons that a cone with the same height as a given cylinder but 3 times the radius should therefore have the same volume as the cylinder, since 1/3•3=

A coin is flipped 3 times If you get tails once you get $5, tails twice you get $15, and tails on all three flips you get $40. What is the expected amount of money you will get?

If the interior angle of a regular polygon measures 170°, how many sides does it have

How do I get the sequence for the next 3 numbers 2,4,8,14, ... ?

Solve by completing the square. If needed round to the nearest hundredth.