100POINTS! SHOW WORK OR I REPORT

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

Select the correct answer. joshua likes to read. he read 6 books when he was 6 years old. every year he doubled the number of books he read the previous year. how many total books did he read between the ages of 6 and 10? a. 60 b. 90 c.186 d.187