Plz help this is due today AND NO LINKS OR GROSS PICTURES OR I REPORT

Solve 2x2 + 8 = 0 by graphing the related function. there are two solutions: . there are no real number solutions. there are two solutions: 2 and -2

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

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of