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Lunna [17]
3 years ago
11

Solve de system by elimination. x-5y=3 4x-4y=12​

Mathematics
1 answer:
Anit [1.1K]3 years ago
7 0

If we multiply the top equation by -4 we can get rid of the x so:

-4x+20y=-12

4x-4y=12

Add these up

16y=0

Y=0

X=3

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Decompose and use the distributive property to find the product of 5 × 7.3.
swat32

Answer:

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Step-by-step explanation:

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6 0
3 years ago
Study guide help?
Thepotemich [5.8K]

Answer:

Step-by-step explanation:

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, r=0,1,2,3

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8 0
3 years ago
You need a 45% alcohol solution. On hand, you have a 175 mL of a 25% alcohol mixture. You also have 70% alcohol mixture. How muc
Bezzdna [24]

175 mL at 25% concentration of alcohol contains 0.25 (175 mL) = 43.75 mL of alcohol. If <em>v</em> is the amount of the 70% solution that you use, then that amount contains 0.7<em>v</em> mL of alcohol.

Mixing these two yields a total volume of 175 mL + <em>v</em>, and it contains 43.75 mL + 0.7<em>v</em> alcohol. You want to end up with a concentration of 45%, which means the ratio of the amount of alcohol to the total volume needs to be 0.45:

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5 0
3 years ago
Determine if the relation is a function. List the domain and range for each.
mamaluj [8]

Answer:

This is a function, because for every x-value, there is exactly one y-value.

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Let me know if this helps!

7 0
3 years ago
Round to the nearest tens 312.432
ValentinkaMS [17]
310, since 4 is not up to 5, then 2 round off to 0
8 0
3 years ago
Read 2 more answers
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