Amath class had 5 girls and 5 boys in the seventh grade and 1 girl and 7 boys in the eight grade. the teacher randomly selects a seventh grader and an eight grader from the class for a competition. what is the probability that the students she select are both boys?

What is the difference between regular convex and concave polygons

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.