A math class has 6 girls and 2 boys in seventh grade and 5 girls and 7 boys in eighth grade. the teacher randomly selects a seventh grader and an eighth grader from class for a competition. what is the probability that the students are both girls?

Find the solutions for a triangle with a =16, c =12, and b = 63º

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Agroup of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?