Please help! 3 inches on a blueprint of a classroom equals 9 feet for the actual room

a) what is the scale of the blueprint?

b) if the dimensions of the classroom is 23 ft X 30 ft what are the dimensions of the blueprint?

c) if the window on the blueprint is 1.5 inches wide, what is the actual width of the window?

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

The verbal translation for the difference of m and 7 increased by 15

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′?