what is the missing justification in the proof of the pythagorean identity below, sin^2(x)+cos^2(x)=1, using a right triangle?

a. transitive property of equality
b. substitution property of equality
c. reflexive property of equality
d. symmetric property equality,

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?

Researchers are conducting experiments to determine the role of alcohol in the development of depression. after the study is complete, they determine that the relative risk of developing depression is 1.55 with a 95 % ci of 1.2 -1.9. each group is then divided into nonsmokers and smokers. the relative risk for the nonsmokers is 1.12 with a 95% ci of 0.87-1.37. the relative risk for the smokers is 1.7 with a 95 % cl of 1.5-1.9. what type of bias may affect this study? a. procedure bias b. recall bias c. selection bias d. confounding e. lead-time bias