If AA and BB are 9×59×5 matrices, CC is a 3×93×9 matrix, DD is a 5×95×9 matrix, and EE is a 9×39×3 matrix, which of the following are defined? A. B+AB+A B. 2A2A C. CBCB D. BABA E. ADAD F. B−CB−C

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

What is the sum of the first 8 terms of the geometric series

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]