Does anyone know the answer?

7x+8y=-18, 4x-9y=-3 solve the system of equations

Abcd is a parallelogram find the valuse of x

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks