Of the 164 students who took a mathematics exam, 72 correctly answered the first question, 93 correctly answered the second question, and 43 correctly answered both questions. how many students did not answer either of the two questions correctly?

42

Step-by-step explanation:

the student that correct only the first question

=72-43=29

the student that correct only the second question

=93-43=50

the student that didn't answer either of the two questions

=all students - 29 - 50 - 43

=164-29-50-43 = 42 persons

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

49/6 is going to equal 8 1/6