reagan1514
03.10.2021 •
Mathematics
The phone company A Fee and Fee has a monthly cellular plan where a customer pays a flat
monthly fee and then a certain amount of money per minute used on the phone. If a customer uses
310 minutes, the monthly cost will be $68. If the customer uses 620 minutes, the monthly cost will
be $99.
A) Find an equation in the form y = mx + b, where x is the number of monthly minutes used and
y is the total monthly cost of the A Fee and Fee plan.
y =
B) Use your equation to find the total monthly cost if 980 minutes are used.
If 980 minutes are used, the total cost will be
dollars.
Solved
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Ответ:
The equation is:
y = mx + bWe have two points:
(310, 68) and (620, 99)A)
Find the slope using these two points:
m = (99 - 68)/(620 - 310) = 31/310 = 0.1Use one of the points to find the y-intercept b:
68 = 0.1*310 + b68 = 31 + bb = 68 - 31b = 37The equation is:
y = 0.1x + 37B)
Find the value of y when x = 980:
y = 0.1*980 + 37y = 98 + 37y = 135The total cost is $135
Ответ:
GH
Step-by-step explanation: