Answer:
The interest rate is 4% per annum.
Step-by-step explanation:
Let the interest rate that I am getting is r% per annum.
So, my $5000 investment becomes $6200 after getting r% simple interest for 6 years.
So, from formula of simple interest we can write
⇒
⇒ r = 4%
Therefore, the interest rate is 4% per annum. (Answer)
8x+6y=48
x+y=7
multiply bottom equation by 6:
6x+6y=42
subtract equations:
2x=6
divide 6 by 2:
x=3
therefore:
y=4
Answer:b
Answer: D. 72°