The vertex of this parabola is at (2,-4). Which of the following could be its equation?
10
10
(2,-4)
10
O A. y = 2(x - 2)2.4
O B. x = 2(y-4)2 + 2
O c. x = 2(y + 4)2 + 2
O D. y = 2(x - 2)2 + 4

Find the greatest common factor of the polynomial: 10x^5+15x^4-25x^3 10x^5 x^3 5x^3 5

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?