2x + 1 and 5x.
I need to add more so hi

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

Complete the synthetic division problem below.what is the quotient in polynomial form 2/16 -16