Nếu bạn đầu tư $8000 với lãi suất 8% (năm), tính theo lãi đơn thì sau bao lâu số tiền đầu tư đạt được $15000?

Iam so stuck. what is the worked out answer for this question?

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

If the value of x increases by 5, how does the value of m(x + 3) change? a) it increases by 5m. b) it increases by 8m. c) it decreases by 5m. d) it decreases by 8m.