Solve the system of equations using gaussian elimination or gauss-jordan elimination.

1. 2x+y=1

3x-6y=4

2. 5x-3y=-2

4x+2y=5

7. The length of a rectangle is two times its width. If the perimeter of the rectangle can be no more than 54 units, what are the possible widths of the rectangle? Answer must be an inequalty, like x is less than or equal to 10 or something.

How to convert foot into meter easily?

When you multiply a negative number by a positive number?

Which ordered pair is a solution of the equation? y = 4x + 9 Choose 1 answer: Only (-3,3) Only (-2, 2) Both (-3, 3) and (-2, 2) Neither

What fraction of £1 is 40p

Write two decimals that can be rounded to 1.5

Eight hundred thousand, six hundred twenty four in number form

Marcy bought 10.32 pounds of white potatoes and 12.48 pounds of sweet potatoes. About how many pounds of potatoes did Marcy buy? Round each weight to the nearest tenth to estimate the total weight of potatoes that Marcy bought.

Let X = {5, 10, 15, 20, 25, 30, 35, 40}. Define a relation on X as follows. For a, b is in X, a b if b can be obtained from a by adding a (possibly empty) collection of dimes (10 cents) and quarters (25 cents). So, for example, 25 35, but 25 30.

Lindell ran 5 kilometers in 25 minutes. How fast did he run in miles per hour?