If the variance of a variable is 169, what is the standard deviation?

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong

80 points suppose marcy made 45 posts online. if 23 of them contained an image, what percent of her posts had images? round your answer to the nearest whole percent. 54 percent 51 percent 49 percent 48 percent

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83