How to determine if an expression is rational or irrational?

Which statements are true? Check all that apply. The central angle measure created by the shaded region is 40°. The central angle measure created by the shaded region is 20°.

To make lemonade, 2 cups of lemon juice are mixed with 7 cups of water. Describe and correct the error in proportion used to find the number of cups of lemonade juice, j, to mix with 28 cups of water. 2/7 = 28/j

How does the product 110 x n compare to the product 11 x n

Work out the difference between 1.95 and 30

There is a rectangular lot in the garden, with 7 ft in length and 5 ft in width. You plan to expand the lot by an equal length around its four sides, and make the area of the expanded rectangle 143 ft2.

Write an expression that will find the weight o

2. Vanessa wants to model how a car's maintenance costs change as the distance someone drives the car increases. What would be an appropriate unit for Vanessa's purpose? Miles/$ Gallons/Miles $/Miles $/Gallons

a population of rabbits triples every month the population starts with two rabbits how many rabbits are there in 3 months?

3. What is the x-coordinate of the vertex of y = 2 (x + 8) (x - 10) ?

Find the values of x for which the equation cos x = 1 is true