Which ordered pair is the solution of the system graphed below?

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

What is the distance between point a and b