Jinning is going to flip a coin. If the result is "heads," he wins $4. If the result is "tails," he loses $7. If he flips the coin 8 times, about how much should he expect to win (or lose)?

How do you find the area of a triangle

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.