What number would you add to the equation below to complete the square? x2 + 7x = 0
A. 49
B. 7/2
C. 14
D. 49/4

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?