Matilda invested $5000. She earned $308 in interest by putting part of it in her savings account that pays 4% interest and the remainder in stocks that yielded 7%. Which system of equations can be used to determine how much she invested at each rate?
A. X+Y= 5000
0.7x+0.4y=308
B. x+y=5000
4x +7y=308
C. X - y =5000
0.04x +0.07y=308
D. X+y =5000
0.04x + 0.07y= 308

Question

Matilda invested $5000. She earned $308 in interest by putting part of it in her savings account that pays 4% interest and the remainder in stocks that yielded 7%. Which system of equations can be used to determine how much she invested at each rate?
A. X+Y= 5000
   0.7x+0.4y=308
B. x+y=5000
    4x +7y=308
C. X - y =5000
    0.04x +0.07y=308
D. X+y =5000
0.04x + 0.07y= 308

amistre64 · Answer

well, we can narrow it down since the sum of the accounts is 5000,  not the difference

amistre64 · Answer

and we want to use an accurate decimal equivalent to a percentage ... 4% is nto 40% after all

amistre64 · Answer

*is not

anonymous · Answer

Is my answer f?