PLEASE HELP ASAP A drug researcher decides to test a new arthritis pain medication for safety
and effectiveness on a treatment group of 17 severely disabled arthritis
sufferers in a hospital ward. For the safety portion of the study, the same drug
will be administered to 17 healthy volunteers from the hospital staff. The
experiment will be repeated with the same experimental design at a number
of other hospitals and outpatient clinics across the country,
Which of the following principles of experimental design are being followed?
Check all that apply.
A. Replication
B. Control
I C. Blindness
D. Blocking
E. Randomization

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.

Which of the following is equal to the rational expression when x is not equal to -2 or -6?