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Kitty [74]
3 years ago
10

John is going to start saving $20 every month to buy a new IPod. His parents gave him $10 for his birthday to open his savings a

ccount. The equation y = 20x + 10 represents John’s savings account balance x months after be began saving.
a) How many months will it take John to save enough money for the $300 IPod? Explain.


b) If John saved $40 per month instead of $20, how would you expect the slope of the graph to change? Explain.
Mathematics
1 answer:
nadezda [96]3 years ago
7 0

Answer:

A) It will take john 15 months to save./////B)The slope of the graph would be steeper.

Step-by-step explanation:

A) It will take him 15 months because 300/20 is 15 and if he earns 20$ every month you multiply 15 by 20 and get 300$.So he will earn 300$ for the new Ipod in 15 months.

B)The slope would be steeper because he is earning more money in less of a time.In this case he would earn 300$ in 7 1/2 months.

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Perform the indicated operation to write given polynomial in standard form: (2x^3 − 6x^2 − 7x − 2) +(x^3 +x^2 +6x − 12)
Kipish [7]

Answer:

\left(2x^3-6x^2-7x-2\right)+\left(x^3+x^2+6x-12\right)=3x^3-5x^2-x-14

Step-by-step explanation:

To add the polynomials

Remove parentheses:

\left(2x^3-6x^2-7x-2\right)+\left(x^3+x^2+6x-12\right)=2x^3-6x^2-7x-2+x^3+x^2+6x-12

Group like terms:

=2x^3+x^3-6x^2+x^2-7x+6x-2-12

Add similar elements:

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In our case the standard form is  

\left(2x^3-6x^2-7x-2\right)+\left(x^3+x^2+6x-12\right)=3x^3-5x^2-x-14

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3 years ago
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