Solve the system
y = 2 - x and y = 4x+7
a. (1,1)
b.(1,3)
,3)
,1)
e. no solution

Ineed with number 6 , explain how to get 1978

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.