A cell phone carrier charges a fixed montly fee plus a constant rate for each minute used. In January, the total cost for 250 minutes was $55 while in February, the total cost for 150 minutes was $53. Choose the formula below which gives the function C(x) representing the monthly cost, in dollars, of a cell phone using x minutes.

Select the correct answer below:

C(x)=0.02x+50

C(x)=−0.02x+56

C(x)=0.05x+28

C(x)=−0.05x+78

mk./km: lm

step-by-step explanation:

,mlmlm

; mk

lk

d is the correct answer

step-by-step explanation:

x= 8 because 3x = 3 * 8, and 3*8 = 24

attachment?

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.