The graph of an ellipse is shown. image.
Which equation represents this ellipse?
answer choices

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

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”?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.