What are the restriction the on variables?

4-x/x^2-16

x≠-4 and x≠4

x≠-4

x≠4

No restrictions needed

A U. S. nickel has a mass of 5.00 grams. A U. S. penny has a mass of 2.50 grams. What is the mass in kilograms of the coins in a bag containing 186 nickels and 72 pennies?

What were Ortoghs? Mongol provinces Chinese coins associations of caravan merchants Mongol boats

What is the value of p such that the line passing through (9,-1) and (6, p) has a slope of - 1?

The population of a town increased from 3450 in 2006 to 4650 in 2011. Find the absolute and relative (percent) increase.

Is x = - 2 - 1 3 6 and y = -3 0 8 11 linear or nonlinear

The coordinates of the vertices of triangle ABC are given in the table. A B C (4,2) (6,7) (13,1) Triangle ABC is reflected across y=-x. What are the vertices of triangle A'B'C'? Enter your answers in the boxes. A': (, ) B': (, ) C': (, )

What is the solution to this equation? 3x - x+8+5x-2=10

Express each of the following as a fraction in lowest terms 1: 3/6 2: 2/8 3: 12/20

Randi earned a profit of $60.00 on her last snow shoveling and salting job. Write an equation that can be solved to find how many hours Randi spent shoveling and salting to earn a profit of $60.00. HINT: Randi charges $25 an hour to shovel and salt.

The lengths of the sides of a triangle are 4, 5, 6. Can the triangle be a right triangle?