The variables y and x have a proportional relationship and y=7 when x=2 what is the value of x when y=21

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

The mean temperature for the first 4 days in January was 4°C. The mean temperature for the first 5 days in January was 5°C. What was the temperature on the 5th day?

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, ... ?