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Nesterboy [21]
3 years ago
8

Y=5x+4 and 3x+2y=20 by using elimination​

Mathematics
1 answer:
nikklg [1K]3 years ago
5 0

Answer:

Step-by-step explanation:

 y = 5x + 4

-5x + y = 4 ----------------------(i)

3x + 2y = 20 --------------------(ii)

Multiply equation (i) by (-2)

(i)* (-2)     10x - 2y = -8

(ii)            <u>3x   + 2y = 20</u>    { Now add this two equations}

              13x           = 12      { -2y and 2y got eliminated}

                          x = 12/13

Plug in value of x in (i)

-5*12/13  + y = 4

-60/13 + y = 4

y = 4 + 60/13

y=\frac{4*13}{1*13}+\frac{60}{13}\\\\=\frac{52}{13}+\frac{60}{13}\\\\=\frac{112}{13}\\\\=8\frac{8}{13}y=

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(n-5)^2 - (6n-35)=(n-10)(n-6)

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7 0
3 years ago
Christopher can eat 8 bags of skittles in 5 minutes. What is his rate per minute? Round your answer to the nearest hundredth. At
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<span>8/5 = 1.6 bag per minute

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4 years ago
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Anna [14]

5 x 3²⁴  bacteria will there be after one day.

What is exponents?

Exponentiation could be a calculation, written as bⁿ, involving 2 numbers, the bottom b and also the exponent or power n, and pronounced as "b to the n".

Consider what is actually happening in the question.

You begin with 5 bacteria, and after 1 hour it has tripled so you now have

5x 3=15.

Next hour, it triples again so you now have 5 x 3 x 3=45

You can see the pattern shows that the number of bacteria is multiplying every hour by a factor of 3. An exponent denotes how many times we are multiplying a number by itself, for example: 3⁴  means we are multiplying the number 3 a total of 4 times (3 x 3 x 3 x 3).

Therefore the question is requiring us to triple the number of bacteria every hour for 24 hours, which means we are multiplying by 3 a total of 24 times. This gives us:

n x 324 where n is the number of bacteria you begin with.

Since you begin with 1 bacteria, the solution is 5 x 3²⁴.

Hence 5 x 3²⁴  bacteria will there be after one day.

To know more about exponents , visit:

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8 0
1 year ago
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the answers are

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8 0
3 years ago
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The difference between two numbers is 9. The first number plus twice the other number is 27. Find the two numbers.​
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