Check the picture below.
so what are the lengths of the 1st and 3rd side anyway? well x - 4 and 2x.
Assuming that the 4.8% interest rate is an annual interest rate, then, after one year, with a principal of $3,000 we would be able to win 4.8% of $3000:

Divide 144 over 12 to find the monthly earnings:

Therefore, with a principal of $3,000 we would be earning $12 interest in 1 month.
For the earnings on the first month to be equal to $10, then you would have to win $120 annually, and $120 must be 4.8% of the principal. To find which quantity satisfies that 4.8% of it is equal to $120, divide 120 over 4.8%:

Therefore, the principal must be equal to $2500 for you to win $10 on the first month, and it would indeed be correct to say that if you open an account with $3000 you will earn at least $10 interest in 1 month.
You number is 40 40 x 2= 80- 16 =64 your welcome :)
So the question says:
____ + ____ = 18
____ * ____ = 77
so the answer is 7 and 11 :)))
lets check it:
7 + 11 = 18
7 * 11 = 77
I hope this is helpful
have a nice day