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Ronch [10]
3 years ago
15

How many solutions does this system have? y=3/4x-5 -3x+4y=-20?

Mathematics
1 answer:
Komok [63]3 years ago
4 0
4y=-20+3x and 4y=13.6x-20
so
-20+3x=13.6x-20
3x=13.6x
3=13.6 so it is wrong and system doesn’t have solution
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3 0
3 years ago
A certain alloy contains 5.25% copper. How much copper is there I a piece weighing 200 pounds?
kykrilka [37]
Find 5.25% of 200
remember
1% of 100=1
therefor
1% of 200=2
just remove the decimal and double it (for this special case of finding percent of 200)

5.25% of 200=5.25 times 2=10.5
answer is 10.5 pounds of copper
(the legit way is 0.0525 times 200=10.5 pound)


10.5lb is answer
4 0
3 years ago
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Usimov [2.4K]

Answer:

Step-by-step explanation:

6 0
3 years ago
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100 meters -78 meters =21 m


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3 years ago
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