Teresa is walking. D(t), given below, is her distance in kilometers from Glenn City after t hours of walking. D(t) = 10.4 - 4t

a) Which statement best describes D^-1(x)?
a. The amount of time she has walked (in hours) when she is x kilometers from Glenn City
b. The reciprocal of her distance from Glenn City (In Kilometers) after walking x hours.
c. Her distance from Glenn City (in kilometers) after she has walked x hours.
d. The ratio of the amount of time she has walked (in hours) to her distance from Glen City (in kilometers) x.

b) D^-1(x) =

c) D^-1(5.2) =

A, (x - 10.4) / -4, -1.3

Step-by-step explanation:

(a)

D(t) = Teresa's distance in kilometers from Glenn City after t hours of walking. The inverse of this would be the time she has walked about x kilometers.

(b)

D(t) = 10.4 - 4t

Change t to x --> y = 10.4 - 4x

Switch x and y --> x = 10.4 - 4y    

Solve for y:

D^-1(x) = x - 10.4 = -4y

D^-1(x) = (x-10.4)/-4

(c)

Insert 5.2 where x is:

(5.2 - 10.4) / 4 = -1.3

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

how much is coupon

step-by-step explanation: