What value of x makes the equation true?

24 - 2(5x - 19) = -(-6x - 4) - 10

For the following sequence determine the common difference (if it is an arithmetic sequence) or the common ratio (if it is a geometric sequence).

If 1/2+2/5s=s-3/4,what is the value of s? a. s=3/4 b. s=25/12 c. s=-25/12 d. s=-3/4

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?