Abrother and a sister are in the same math class. there are 8 boys and 10 girls in the class. one boy and one girl are randomly chosen. what is the probability that the brother and sister are chosen? write your answer as a fraction in simplest form.

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

Astrid spent $36 on new shoes. this was $12 less than twice what she spent on a new skirt. part a: which equation would solve for how much she spent on the skirt? part b: solve the equation in the workspace provided below. how much did astrid spend on her skirt?

Which size random sample is likely to provide the most trustworthy results