Mrs. barlow's math class took a test yesterday. out of 60 students, 70% of them passed. how many of mrs. barlow's students passed the test?

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?