Which of the following principles of experimental design reduces error due to change by repeating an experiment on different subjects under different conditions? A) Placebo effect B) Replication C) Control D) blindness E) Randomization

grab rope, tie a loop-de-loop, put it around ur neck, now jump while its tied to a high place. now your shoes are cool.

step-by-step explanation:

answer: 2x + 2 − 2 = 10 − 2; subtraction property of equality

step-by-step explanation:

i belive those are the ones that are under 90 degreese.

i think is g(1)=-1.

hope that i can