I think the equation is x^2 - 20x + -10 = 0
Answer:
£1045.57
Step-by-step explanation:
Using compound interest formula then

Where A= the future value of the investment/loan, including interest
P = the principal investment amount
r = the annual interest rate
n = the number of times that interest is compounded per unit t

Hence her amount t the end of 5 yrs is $1045.57
Answer:
A
Step-by-step explanation:
Answer:
11 grades of 85 did Brenda, Robert, and Timothy receive altogether.
Step-by-step explanation:
Let 6x be the number of 85 received by Brenda.
The number of 85 received by Robert is 1/3 of Brenda= 2x
The number of 85 received by Timothy is 1/2 of Brenda= 3x
Then according to the given conditions
6x+ 2x+ 3x
= 11x
So the number of total 85s received by all the three is 11.
11 grades of 85 did Brenda, Robert, and Timothy receive altogether.