Mary sold half of her comic books and then bought nine more. She now has sixteen. How many did she begin with?

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?

Determine if the sequence is arithmetic or geometric.  then identify the next term in the sequence.    0.2, 1, 5, 25, . . group of answer choices arithmetic; 75 geometric; 75 arithmetic; 125 geometric; 125