X squared = 49 what does x equal

3x + 4y = 5 x- 3y = -7 solve by substitution

The random variable x has probability density function f (x) = k(−x²+5x−4) 1 ≤ x ≤ 4 or =0 1 show that k = 2/9 find 2 e(x), 3 the mode of x, 4 the cumulative distribution function f(x) for all x. 5 evaluate p(x ≤ 2.5). 6 deduce the value of the median and comment on the shape of the distribution.

If you bought a stock last year for a price of $124, and it has gone down 5.6% since then, how much is the stock worth now, to the nearest tenth?