Alex rewrote the expression 1/2(4t-7) as 2t-3 1/2. Which property of operations did Alex use?

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.

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).

Acircle has a circumference of 7.850 units. what is its radius?