A^2 +b^2 = c^2
a= wall
b = ground (18)
c = ladder (25)
a^2 + 18^2 = 25^2
a^2 + 324 = 625
a^2 = 301
a = 17.349
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➷ Expand out each option to see which one it is
1) (x + 1)(x - 3) = x^2 - 3x + x - 3 = x^2 - 2x - 3
(x - 6)(x^2 - 2x - 3) ==> x^3 - 8x^2 + 9x + 18
As you can see, this matches the original equation.
Therefore, the answer is option A.
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Find the mean of the numbers first. The find the difference that each one is from the mean (negative and positive differences). Find the mean of the differences and that is the MAD.
It would be false i think
Add 3n to each side so you get...
9n = 26
Finally, divide by 9 on each side...
9n = 26
_______
9 9
The answer is n = 2.89999
