Does anyone know how to do this
a1=9
a_n= a_n-1 -4

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2

According to a study done by de anza students, the height for asian adult males is normally distributed with an average of 66 inches and a standard deviation of 2.5 inches. suppose one asian adult male is randomly chosen. let x = height of the individual. a) give the distribution of x. x ~ b) find the probability that the person is between 64 and 69 inches. write the probability statement. what is the probability?