Do all squares have two pairs of parallel sides?

What is the standard form of the number below?

Solve: log4 (5x-3) + log4 (9-x) = 3

123 divided by tan36° multiplied by 15

What is - 9k^2 - 5k^2?

9a-3d=31 -3d+1d=-1 Solve by elimination

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, ... ?