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Basic Algebra

Filling an aquarium tank

An aquarium tank can hold 7700 liters of water. There are two pipes that can be used to fill the tank. The first pipe alone can fill the tank in 77 minutes. The second pipe can fill the tank in 44 minutes by itself. When both pipes are working together, how long does it take them to fill the tank?

Solve Using a + bi Form

Write the following expression in the form a + bi, where a and b are real numbers. (3 - 5i) - (2 - 7i)

Simplify principle square root

Principle square root 3 Principle square root 3 -------------------------- - ----------------------------- principle square root 6-1 principle square root 6 + 1

Simplifying Expressions

Square root 6 square root 14 -------------------------- * ------------------------------- square root 7 square root 3

Simplifying Expressions

Simplify. Assume a and b are positive real numbers and m and n are rational numbers. ( a^-3/mb^6/n)^-1/3 ------------------ (a^-6/mb^9/n)

Find the LCD for the rational expressions

Find the LCD for the following rational expressions, and convert each rational expression into an equivalent rational expression with the LCD as the denominator. 4/x -y , 5x/ 2y - 2x

Solve for w

-6/ w + 3 = -15/w Please solve for w in this problem.

Minimum and maximum surface areas of a cube are found.

I need to find the maximum and minimum surface areas for 2 cubes with a total volume of 432 in^3. No other perameters are specified. I've been able to use common sense to find the max is 432 sq/inches (two 6"^3 cubes) and min is 343.051 sq (one 7.5595"^3 cube and one cube of 0.171"^3). I need help with the equations for the maxi