What is the y intercept of y=2x^2-4x-1?

In the diagram, gef and hef are congruent. what is the value of x

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)