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yawa3891 [41]
2 years ago
4

A cash card has a starting value of $25. If the card is not used within the first year of its purchase, the value on the card be

gins to decrease by $2.50 per month.
The relationship between the number of months after the first year and the amount remaining on the card is .

The independent variable is the _____________?

The dependent variable is the ______________?
Mathematics
2 answers:
kolezko [41]2 years ago
3 0

Answer:

  • The relationship between the number of months after the first year and the amount on the remaining card is l<u>inear and inverse</u> (which means that, when the number of montsh after the first year increases, the amount on the remaining car decreases, in a linear way).
  • The independent variable is the numbers of months after the first year.
  • The dependent variable is the amount on the remaining card, because this amount <u>depends on the time it has passed since the first year </u>(which is our independent variable!).
  • If we call "y" our dependent variable, and "x" our independent variable, this relationship can be written as y=25 - 2.5x.
  • If no months has passed since the first year, then x=0 and the amount in the card equals $25, while if one month has passed since the first year x=1 and y=22.5 (the amount in the card in this case is $22.5).
fomenos2 years ago
3 0

Answer:

1st one should be discrete

Step-by-step explanation:

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Lina has 12 coins in her purse. D of them are dimes and the rest are quarters.
SVETLANKA909090 [29]

Answer:

she has 12 - D quarters.

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Step-by-step explanation:

You know that the number of coins, and you know the number of dimes - even if the amount is a variable - you can find the amount of quarters with an equation.

If you knew that Lina had 6 dimes instead of D, you would say 12 - 6 and get the number of quarters. You can do the same thing here.

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Carl lives in an apartment and pays the following expenses each month: electric bill, $34.60; TV streaming service, $24.99; and
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$34.60 rounds to $35
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————-
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