HELP HELP HELP PLEASE!!!

Right ∆abc has coordinates a(-7, 3), b( -7, 10), and c(-1, 3). the triangle is reflected over the x - axis and then reflected again over the y - axis to create ∆a'b'c'. which are the coordinates of vertex a'?

Find the measure of vu. enter the answer as a number.

The height of a certain banner is equal to one third of its length. if the banner is 5 feet tall, write an equation that can be used to find the banner's length,l, in feet