Find the sum of each arithmetic series described below. (a) The sum of the first 100 even, natural
numbers.
(b) The sum of multiples of five from 10 to 75,
inclusive.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?