Which of the following equations have exactly one solution? Choose all answers that apply: А 2x - 31 = 2x - 31
B. 2x - 31 = -2x - 31
C. 2x +31 = 2x - 31
D. 2x - 2 = 2x - 31

PLEASE HELP- RIGHT ANSWERS ONLY- WILL GIVE BRAINLIST TO FIRST CORRECT ANSER- MY GRADE DEPENDS ON IT

Which ratio is equivalent to 10: 85

Find the gradient of f(x, y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%