a)Select a variety of one- and two digit numbers between 1 and 99 and multiply by 9. Record your results. b) Find the sum of the digits in each of your products in part (a). If the sum is not a one digit number find the sum of the digits of the resulting sum again until you obtain a one -digit number, c) make a conjecture about the sum of digits when a one- or two digit number is multiplied by 9

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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a)Select a variety of one- and two digit numbers between 1 and 99 and multiply by 9. Record your results.

b) Find the sum of the digits in each of your products in part (a). If the sum is not a one digit number find the sum of the digits of the resulting sum again until you obtain a one -digit number,

c) make a conjecture about the sum of digits when a one- or two digit number is multiplied by 9 

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