Mathematics: The phone company NextFell 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 260 minutes, the monthly cost will be $114. If the customer uses 640 minutes, the monthly cost will be $247. A) Find an equation in the form y= mx+b, where x is the number of monthly minutes used y is the total monthly cost of the NextFell plan. B) Use your equation to find the total monthly cost if 949 minutes are used.

The phone company NextFell has a monthly cellular

katiemaley19

10.02.2022

Explained below.

Step-by-step explanation:

(A)

Use two-point form to determine the equation for the total monthly cost of the NextFell plan.

$(y-y_{1})=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}\cdot (x -x_{1})\\\\(y-247)=\frac{247-114}{640-260}\cdot (x-640)\\\\(y-247)=0.35x-224\\\\y=0.35x+23$

(B)

Compute the total monthly cost if 949 minutes are used as follows:

$y=0.35x+23\\\\=(0.35\times 949)+23\\\\=355.15$

Thus. the total monthly cost if 949 minutes are used is $355.15.

0,0(0 оценок)

prayingfeet7799

23.01.2021

A. 5 cm, 5cm and 7 cm

Step-by-step explanation:

Por que en la misma regla lo marca

0,0(0 оценок)