( _+_- _+_) - ( _+_- _+_) = 0 The numbers given are 1,2,3,4,5,6,7,8,9 please help !!!

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

Find the probability that -0.3203 < = z < = -0.0287 find the probability that -0.5156 < = z < = 1.4215 find the probability that 0.1269 < = z < = 0.6772

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'?