If the measure of 4 is equivalent to (2x - 7) what is the value of x

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240