a) You're supposed to decribe what each of those quantities represents.
m+n = total number of ink orders placed that month
mB+nK = total number of gallons of ink purchased that month
(mB+nK)/(m+n) = average number of gallons of ink per order
b) Interpret and describe the meaning of the expressions
m/(m+n) = fraction of blue ink orders out of the total ink orders
1/(1+2) = 1/3 of the orders in January were blue ink
n/(m+n) = fraction of black ink orders out of the total ink orders
2/(1+2) = 2/3 of the orders in January were black ink
Next Question. Area of a rectangle is Length times Width. A = WL
W = 2x
A = (4x²+2x)
Using the formula for area, solve for Length.
A = WL
A/W = L
(4x²+2x)/2x = L
factor out a 2x
2x(2x+1)/2x = L
(2x+1) = L
The Length is one more than the Width.
A = WL
(4x²+2x) = 2x(2x+1)
