What is the length of de
A. 2
B. 3
C. 4
D. 5

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

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).

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.