Which expression is equivalent to StartFraction 2 a + 1 Over 10 a minus 5 Endfraction divided by StartFraction 10 a Over 4 a squared minus 1 EndFraction? StartFraction 2 a Over (2 a minus 1) squared EndFraction StartFraction 50 a Over (2 a + 1) squared EndFraction StartFraction (2 a minus 1) squared Over 2 a EndFraction StartFraction (2 a + 1) squared Over 50 a EndFraction

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Acylinder with a base diameter of x units has a volume of jxcubic units which statements about the cylinder are true? check all that apply. the radius of the cylinder is 2 x units. the radius of the cylinder is 2x units. the area of the cylinder's base is 200 square units. the area of the cylinder's base is a square units. the height of the cylinder is 2x units. the height of the cylinder is 4x units. mark this and return save and exit next submit

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”?