c. Suppose you are given the functa. If f(x) = 10x − 1, the value of f(−2) is . b. If g(x) = −5x + 13, the value of g(1) is . c. If h(x) = x2 − x − 12, the value of h(3) is .ion h(x) = −2x + 3 and asked for h(4). This is the same as asking for the value of the function at x = .

Daily reminder

reminder don't just ask and

don't be just

don't abuse that it's just a question the is made for a difficult question so don't abuse.

answer right

c. f(-2)= -21

b. g(x)=8

c. h(3)= -19

h(4)= -5

Step-by-step explanation:

Before consuming 100 minutes over the 200 minutes included plan B is cheaper, After consuming 100 minutes over the 200 minutes included plan A is cheaper.

Step-by-step explanation:

We need to derive the equation for Plan B. For that we can take two points in the graph.

Point P (x=0, y=15)

Point Q (x=20, y=20)

Replacing this in the general formula of a straight line (y=mx+x, where x and y are coordinates, m is the slope and n is the intercept) we get two equations, from which we get m and n.

y=0.25*x+15

We need to know at which point both lines meet each other, where both y (total cost) are the same. We do that by equalising the equations.

We get that at 100 minutes both plans cost the same (noth have the same y). Then, it's a matter of knowing which plan costs more before and after those 100 minutes. By making a rough sketch of the equations (you may do one more precise yourself to see it more clearly) we see that before x= 100 min plan b has a lower cost (lower y), but after plan A is more attractive (has a lower y).