Prime Factorization of 63 is 3 x 3 x 7. What is the equivalent expression?
A. 23 x 7
B. 9x7
C. 32 x 7
D. 3x7

Abari owns 100 shares of stock a and 45 shares of stock b. for the past month, his stocks have been fluctuating inversely. stock a decreased by m cents per share and stock b increased by n cents per share. which equation can be used to find the total change in value of jabari's shares per month?