Let A be an m times n matrix. Explain why the equation Upper A Bold x equals Bold b has a solution for all b in set of real numbers R Superscript m if and only if the equation Upper A Superscript Upper T Baseline Bold x equals Bold 0 has only the trivial solution.

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

Divide. write in simplest form 41/6 divided by 10

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?