(2.4+4n)+9
SHOW ALL WORK!

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

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

Two line segments are shown in the figure below. suppose that the length of the line along the x-axis is 6, and the length of the hypotenuse of the triangle is 10. what is the equation of the hypotenuse line (shown in red, below)?