Answer:
y = 400 (amt invested at 4%)
x = 500 (amt invested at 7%)
Step-by-step explanation:
Kindly check attached picture for detailed explanation
Answer:
the answer is d sorry if im wrong
First subtract 30 from both sides so it is equal to 0
the quadratic formula is -b plus or minus sqrt of (b^2 - 4ac) all over 2a so
-10 plus or minus sqrt (100-25) all over 2
this is equivalent to
2x squared +1 (-)x squared -7 is
a.) x squared +8