Answer and Explanation
Your Answer is
Correct Answer is D
Explanation
Simultaneous equations x+y=21 and xy=15 according to the topic. By solving this system of equations, the values of x and y are 18 and 3, so xy=54. Choose D.
Your Answer is
Correct Answer is D
Explanation
Simultaneous equations x+y=21 and xy=15 according to the topic. By solving this system of equations, the values of x and y are 18 and 3, so xy=54. Choose D.