Solve the system of equations by substitution. y=4x-13 2x+3y=17

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

What is always true about a positive integer raised to a negative odd power?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a