On a recent test, students had the following scores: 85, 100, 92, 96, 87, 94, 75. for these scores, find: a) mean b) variance = sum of (difference from the mean)^2 c) standard deviation = square root of the variance

Consider the graph of the exponential function y=3(2)×

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

Solve 3x-18=2y and 5x-6y=6 by elimination show work