12 A supermarket sells the three brands of rice shown in the table below. Brand
Mass of Rice
Price
A
500 g
$1.20
B
5 kg
$9.80
C
10 kg
$18.90
Raimondo wants to buy 30 kilograms of rice.
a) Which brand of rice should he buy to get the best deal, assuming that
all three brands are of the same quality?
b) How much will he save if he buys the cheapest brand of rice as compared
to the most expensive one?

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

What is the slope of the line that contains the points (-2,1) and (0,-3)