The 15th and 21st terms of an arithmetic sequence are -67 and -97, what is the 30th term?

For the given quadratic equation convert into vertex form, find the vertex and find the value for x=6 y=-2x^2+2x+2

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.