Find the sum of the given polynomials.

3x 2 + 2x - 5 and - 4 + 7x 2

1. - x2 + 9x - 9

2. 21x2 + 2x + 20

3. 10x2 - 5x - 1

4. 10x2 + 2x - 9

The difference of two numbers is 8. Their sum is 26. Find the numbers.

Arrange in ascending order a. cos (40), cos (80), cos (120), cos (160) b. sin (-90), sin (80), sin (-120), sin (30), c. cos (130), cos (240), cos (-30), co380s

Use a model to solve 7/8 x 16 =

Subtract: 31/8 - 17/8 =

Joanna is carrying her books to school in her backpack. Her library book weighs 3/8 of a kilogram. Her science book weighs 5/8 kilograms. How much do Joanna's book weigh altogether?

Joe is making a recipe that calls for 3/4 teaspoon of cinnamon. His only measuring spoon holds 1/8 teaspoon. How many times will he need to fill his measuring spoon to get enough cinnamon for the recipe?

Which of the following describes the graph of y=x^2-144? The graph has zeroes at x = - 12 and x = - 12 and it opens downward. The graph has zeroes at x = 12 and x = - 12 and it opens downward.

You deposit $700 in an account paying 7.7% simple interest. Find the future value of the investment after 2 years. (Enter a number. Round your answer to two decimal places.)

What are two expressions where the solution is 19

The sum of two numbers is 17. The difference between the larger number (x) and the smaller number (y) is 7. What is the value of the smaller number?