Apply properties of operations to multiply 5a^2b^5c^3 x -4a^7c^3. (1 point)
A. 20a^14b^5c^15
B. -20a^14b^5c^15
C. -20a^9b^5c^8
D. 20a^9b^5c^8
The answer is B. -20a^14b^5c^15.
To solve this problem, first multiply the coefficients together: 5 * -4 = -20.
Then, multiply the variables with the same bases together: a^2 * a^7 = a^9 and b^5 * b^0 = b^5 and c^3 * c^3 = c^6.
Finally, combine the coefficients and variables to get -20a^9b^5c^6.
So the correct answer is B. -20a^14b^5c^15.