The answer is =x^2 +x +1 +2/x-1

as you notice above, is the first-row components from A, multiplying all the columns subsequently on B, and you add the products of that row, that gives you one component on the AB matrix
in the one above, we end up with a 2x3 AB matrix
Function y = -2x + 5:
slope of -2
y intercept at 5
x intercept at 2 1/2
function y = x
slope of 1
y intercept at 0
x intercept at 0
7 3/10 in percent would be

%
730%percent means over 100
So... 730% = 730/100 = 7.3
1200 +29%= (1200+240)=1440
1440-300=1140
1140÷10=114
so the answer is £114 per month for 10 months