What number should be added to the expression x2 + 10x to change it into a perfect square trinomial?
a 5
b 10
c 25
d 100

Which is an equation for the nth terms of the sequence 12,15,18,21

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter