In a 20 item true-false examination, if 12 correct answers constitute a passing grade, what is the probability that someone will pass, if they are guessing?

A. 0.8398
B. 0.1201
C. 0.2517
D. 0.1316

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

The value of cos 30° is the same as which of the following?

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.