Plz hellppp 10 points!! Select the correct difference.
5d^2 + 4d-3 less 3d^2-2d+4
answers:
a. 2d^2+2d+1
b. 2d^2+6d+7
c. 2d^2+6d-7
d. -2d^2-6d+1

Tiara buys the pizza shown below: a circular pizza is shown. the edge of one slice is marked ab. what does the curve ab represent?

How many days was the temperature above 90 degrees?

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?