If number a is two digit number and its digits are trans posed to form number b then the difference between the larger of the two numbers in the smaller of the two numbers are divisible by?

a) an even number
b) 7
c)9
d)8

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

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?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !