I AM TIMED What substitution should be used to rewrite 6(x + 5)^2 + 5(x + 5) – 4 = 0 as a quadratic equation?

u = (x + 5)
u = (x – 5)
u = (x +
+ 5)2
u=(x – 5)2

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?