NEED HELP PLS Use addition to solve the sytem if linear equation. Include all of your work in your final answer.
{-x -y = 4
{x + 2y = 4

Each equation given below describes a parabola. which statement best compares their graphs? x = 2y^2 x = 8y^2

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?