Radical Equations and Extraneous Roots — Unit test Answers

Jamal simplified the expression where and . Which describes the error Jamal made?

What is the solution of ?

The area of a square room in square units can be represented by 169x2y4. What is the perimeter of the room?

A science teacher told his students that the expression represents the area in square units of the contaminated square region in their activity. What is the width of the region in simplest form?

What is the simplified form of the following expression?

The formula relates the time, T, in seconds for a pendulum with the length, L, in feet, to make one full swing back and forth. What is the length of a pendulum that makes one full swing in 2.2 seconds? Use 3.14 for .

Which expression is equivalent to ? Assume and .

The mean sustained wind velocity, v, can be determined by the equation , where p is the air pressure, in millibars, at the center of the hurricane. What is the approximate air pressure at the center of a hurricane when the mean sustained wind velocity is 64 meters per second?

What is the solution of ?

Which expression is equivalent to ?