What conversion factor can be used to convert the number of blocks to the weight of the blocks, in pounds?

Nine more than four times a number is the same as one less than twice the number. find the number?

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).

Given the median qr and trapezoid mnpo what is the value of x?