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3 years ago

2x-y=3 ; 5x+2y=30 solve using elimination

Mathematics

1 answer:

Zigmanuir [339]3 years ago

4 0

Answer:

x = 4, y = 5

Step-by-step explanation:

$2x-y=3\\4x-2y=6$

so:

$4x - 2y = 6\\+ 5x + 2y = 30\\9x= 36\\x=4$

Substitute this into 2x - y = 3:

$8-y=3\\y = 5$

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What is the numberpattern in 4-14-30-?

maria [59]

Answer: You can count them by 2?

Step-by-step explanation:

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30

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3 years ago

Easy question

Leviafan [203]

$\dfrac{\mathrm dy}{\mathrm dt}=ky\iff\dfrac{\mathrm dy}y=k\,\mathrm dt$

Integrating both sides, we get

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When $t=0$ , we have $y=10000$ , so that

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3 years ago

I really need help with this

Marrrta [24]

Answer:

G=21, F=9, M=6, L=7, E=20, D=15, B=10, R=12.5, T=16, N=13.5, W=18, H=36, Z=12

*I=5*

Step-by-step explanation:

I basically just found the scale factor/proportion from two given sides and then used that to find the remaining sides.

*I'm not sure about 'I' since the edge of the paper was cut off so I want sure if it was a 5 or a 15 on the left most problem in the third row. I assumed it was 15. If it's not, just shout it out in the comments and I'll fix it! :)*

You can fill the letters in at the bottom XD

I hope this helped! :D

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3 years ago

There are 5 red marbles, 4 blue marble, 2 green marbles, and 1 yellow marble in the bag. What is the probability of pulling out

kykrilka [37]

Answer:

Red : 5/12

Blue : 1/3

Green: 1/6

Yellow : 1/12

Step-by-step explanation:

5 red marbles + 4 blue marbles + 2 green marbles + 1 yellow marble = 12 total marbles

5 red marbles / 12 total marbles = 5/12

4 blue marbles / 12 total marbles = 4/12 = 1/3

2 green marbles / 12 total marbles = 2/12 = 1/6

1 yellow marbles / 12 total marbles = 1/12

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3 years ago

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galben [10]

Answer:

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Step-by-step explanation:

hgdyhbder gyvsety0?

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3 years ago