Salvador is 15 years older than Elizabeth. In 6 years, the sum of their ages will be 87. How old are they now? please include and explantation

What is the average rate of change for this function for the interval from x=2 to x=4 ?

Mr. rose asked his students to draw a quadrilateral with 4 unequal sides. draw an example of this kind of quadrilateral.

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 less than 132. the probability that a randomly selected adult has an iq less than 132 is?