a person with no more than $15,000 to invest plans to place the money in two investments. one investment is high risk, high yield; the other is low risk, low yield. at least $2000 is to be placed in the high-risk investment. furthermore, the amount invested at low risk should be at least three times the amount invested at high risk. they will invest x dollars into the high risk account and y dollars into the low risk account. write a system of inequalities to model this situation choose all inequalities that apply.