A sequence is defined recursively as follows: a(1)=1, and a(n)=a(n-1)+n How do you interpret this recursive rule? Write it down in your own words.
Write down the rule for a(2), a(3), and a(4) and determine their values.

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y