5(1+ 4x ) + 2 x =27
5+20x +2x = 27
27 x ( divide ) 27
27 x divide ) 27
X=1 what is the mistake ?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?