¿Cuál es la ecuación de la circunferencia cuyo centro es (-4,8) y pasa por el punto (-2, -1)? ¿cuál es la correcta?
1.-(x + 4) ^ 2 * (y - 8) ^ 2 = 40

2.-(x + 4) ^ 2 + (y - 8) ^ 2 = 85

3.-(x + 2) ^ 2 + (y + 1) ^ 2 = 40

4.-(x + 2) ^ 2 + (y + 1) ^ 2 = 85

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.

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?