Sal is trying to determine which cell phone and service plan to buy for his mother. The first phone costs $100 and $55 per month
2 answers:
<h2>Answer:
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Part 1:
The first phone costs $100 and $55 per month for unlimited usage.
Let f(x) be the cost of the first phone and x be the number of months.
Equation forms:
The second phone costs $150 and $51 per month for unlimited usage.
Let g(x) be the cost of the second phone and x be the number of months.
Equation forms:
We have to find the inequality that will determine the number of months, x, that are required for the second phone to be less expensive, it is given by:
Part 2:
The solution to the inequality is:
=>
=>
=>
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Or rounding off to 13.
Part 3:
Sal’s mother would have to keep the second cell phone plan for at least 13 months in order for it to be less expensive.
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Given
There are four defenders on a soccer team
if this represents 20 percent of the players on the team
Find out the total number of players on the team.
To proof
As given in question
four defenders on a soccer team
this represents 20 percent of the players on the team
let the total number of players = x
First convert 20% in the decimal form
Than the equation becomes
0.20x =4
now solving the above equation
we get
x = 20
thus the total number of players on the team are 20.
Hence proved