In classroom of 30 students, 15 students take notes in pencil, 20 students take notes in pen,
and 8 students take notes in pen and pencil.
How many students do not use a pen or pencil
to take notes?

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 23 = 10x a. -1.93, 11.93 b. 1.93, -11.93 c. 1.93, 11.93 d. -1.93, -11.93

Merrida uses a pattern in the multiplication table below to find ratios that are equivalent to 7: 9. if merrida multiplies the first term, 7, by a factor of 6, what should she do to find the other term for the equivalent ratio? multiply 9 by 1. multiply 9 by 6. multiply 9 by 7. multiply 9 by 9.

Find the zeros of each function. f(x) = 6x^2 - 7x - 20