What is the greatest common factor of 20a^2 and 12a^2 and 8a?

Will give brainliest series to sigma notation write the following series in sigma notation. 6+10+14+18+22+26+30 example image shown below.

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then, the two had the same amount of money. how much money did each have originally?

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)