Solve the following system of equation. express your answer as an ordered pair in the format with no space between the number or symbols
2x+7y=-7
-4x-3y=-19

Abag contains 3 red marbles 4 white marbles and 5 blue marbles if one marble is drawn from the bag what is the probability that the marble will be blue

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

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%