HELPPP 7TH GRADE MATH PLEASE HELP I UPLOADED A PHOTO

Find the solution of system of equation y= x-4 y=4x+2

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?