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stealth61 [152]
3 years ago
5

Larry has a gift card worth 400 for a local entertainment store Movies cost $20 each and newly released video games cost $50 eac

h. In order to use the gift card, Larry must purchase at least nine items. Which is a combination of movies and newly released video games that Larry could purchase using his gift card?A: (5, 6)B:(10, 4)C: (20,0)D:(15, 2)

Mathematics
1 answer:
Vikki [24]3 years ago
4 0

Answer:

All are correct.

Step-by-step explanation:

Let x be the number of movies and y be the number of newly released video games.

Larry has a gift card worth 400 for a local entertainment store Movies cost $20 each and newly released video games cost $50 each.

20x+50y\leq 400

Larry must purchase at least nine items.

x+y\geq 9

Check both inequalities of all given ordered pairs.

For (5,6),

20(5)+50(6)\leq 400\Rightarrow 400\leq 400

5+6\geq 9\Rightarrow 16\geq 9

Point (5,6) satisfy both inequalities.

For (10,4),

20(10)+50(4)\leq 400\Rightarrow 400\leq 400

10+4\geq 9\Rightarrow 14\geq 9

Point (10,4) satisfy both inequalities.

For (20,0),

20(20)+50(0)\leq 400\Rightarrow 400\leq 400

20+0\geq 9\Rightarrow 20\geq 9

Point (20,0) satisfy both inequalities.

For (15,2),

20(15)+50(2)\leq 400\Rightarrow 400\leq 400

15+2\geq 9\Rightarrow 17\geq 9

Point (15,2) satisfy both inequalities.

Therefore, all combination of movies and newly released video games Larry could purchase using his gift card.

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1) What is the solution of the given system?
m_a_m_a [10]

Answer:

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Step-by-step explanation:

1) What is the solution of the given system?

5x-y=-7

3x-y=-2

Multiply the second equation by -1

-1*(3x-y)=-1(-2)

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Now add the first equation to the modified second equation

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------------------

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5x+7y=32

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Divide the second equation by 2

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Now multiply the modified 2nd equation by -5

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---------------------

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5x =25

Divide by 5

5x/5 =25/5

x=5





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