x - 5 = 2, we can solve for x by adding 5 to both sides yielding:
x = 7
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Given a Poisson distribution with mean = 2. Find P(X < 5)
This expression can be simplified to: 2-6x
If you mean: 4x -2 = 86 then the value of x is 22 when solved
25y2 - 49w2 = (5y)2 - (7w)2 = (5y - 7w)(5y + 7w)
That's easy, just half it. 420 divided by 2 (5 is half of 10) which equals 210. (1) To check my answer, I did... 42 x5 (5 x 2=10 (carry the one), then 5 x 4=20 + 1= 120) ---- 210