Use the slope and the given point to determine a second point that is on the line. m = 4 through (1, 3)
m = 1/5 through (7, -2)

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Solve the system of equations y= 3/2 - 1, -x+ y =-3

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).