Which expression completes the statement to form a true equation 28-3+2= a 3 third power b 5(4+2) c 3 2nd power +19 d 44-2 4th power

(40 points) i need some . an answer definition is appreciated as well.

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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