Answer:
a. 
b .$914.85
Step-by-step explanation:
Step one:
given data
principal p=$750
rate= 5%= 0.05
for quarterly compounding n=4
a. the function that represents the balance after t years.

A = final amount
P = initial principal balance
r = interest rate
n = number of times interest applied per time period
t = number of time periods elapsed
b. when t=4

A= $914.85
The formula for an arithmetic sequence is An=A1+(n-1)d.
Using this knowledge, you can set up the equation easily to be An=1+(12-1)-5
You then simplify this to 1-55 using PEMDAS, giving you the answer for the twelfth term being -54, you then do this for every term if you want (or you could just subtract 5 by the terms after 14 till you get to -54. After all that, you add the twelve terms up to get -319 as your final answer
Answer:
multiply equn q by 3 .
when u will multiply equn 1 by 3 then you will get,9x+3y=39 and second equn is4x_3y=13 so, y can be cancelled and get the value of x for the first time and by putting the value of x you will find the value of y.
X + 3 < 2x
3<2x-x
3 < x
x is greater than 3
X=-1/3
In other way is
X=0.3,x=-3^-1