Answer:
The total cost C = $10 + $0.05·x
Step-by-step explanation:
The given parameters are
The cost of the cell phone plan per month = $20
The number of minutes of free calls that one can make in a month = 200 minutes
The cost of additional minutes of cell phone call = 5 cent
5 cents to a dollar = $0.05
The total number of minutes of calls made in a month = x
The time duration of a person's usage of the cell phone in a month > 200 minutes
The total cost C of a person's usage per month is given by;
C = $20 + $0.05 × (x - 200) = $20 + 0.05·x - $10
C = $10 + $0.05·x
Where x > 200.
Answer:
Step-by-step explanation:
SOLVE BY SUBSTITUTION:
STEP 1: Replace all occurrences of 
with 
in each equation.
STEP 2: Solve for 
in the first equation.
STEP 3: Replace all occurrences of with 
in each equation.
Answer:
0.07
Step-by-step explanation:
0.70-0.63
Answer:
8.1% decrease
Step by step
To find precentage decrease we use formula:
Percent decrease= original amount-new amount/original amount(100%)
percent decrease= 7,400-6,800/7,400(100%)=300/37=8.1%
That answer is pyrimad cuz it has 4 sides and congruent parell 2 sides
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