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lbvjy [14]
2 years ago
10

WRITING Explain how to solve the system of linear equations

Mathematics
1 answer:
Keith_Richards [23]2 years ago
3 0

Step-by-step explanation:

2x - 3y =  - 4.....(1) \\  - 5x + 9y = 7.....(2) \\ \\(1) \times 5 \\ 10x - 15y =  - 20.....(3) \\ (2) \times 2 \\  - 10x + 18y = 14.....(4) \\  \\ (3) + (4) \\ 10x - 15y - 10x + 18y =  - 20 + 14 \\ 3y =  - 6 \\ y =  - 2 \\  \\ (1) \\ 2x - 3 \times ( - 2) =  - 4 \\ 2x + 6 =  - 4 \\ 2x =  - 10 \\ x =  \frac{ - 10}{2}  \\ x =  - 5

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Jay has 14 blocks in all he has6 yellow blocks the rest of the blocks are green how many green blocks does jay have
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3 years ago
Zene deposited $50 in a savings account earning 5% interest, compounded annually. To thenearest cent, how much will he have in 3
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Step-by-step explanation:

we know that    

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6 0
3 years ago
On average, Jaimie can bike five times as fast as he can run. To travel 25 km, he needs 2 h more if he is running than if he is
monitta

Answer: Running speed is 10k/h

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Step-by-step explanation:

My procedure may be unconventional, but it works:

Compute the time it takes, then translate to speed. 25k at biking speed takes 2 hours less than at running speed which is 1/5 bike speed.

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2.5 h - .5 h = 2 hours, the difference stated in the question.

6 0
3 years ago
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