(2.3) and (-15.5) find the slope of the linw

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Which of the binomials below is a factor of this exression? 16x^2+40xy+25y^2 a.4x-5y b. 2x-5y c.4x+5y d.2x+5y