Find the 20th, 40th, 60th, and 80th percentiles of the standard normal distribution. round the answers to two decimal places.

the 20th percentile =

the 40th percentile =

the 60th percentile =

the 80th percentile =

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2