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3 years ago

System of equations Y=-1/2x+4 3x-4y=12

Mathematics

1 answer:

Kaylis [27]3 years ago

5 0

Answer:

{x,y} = {8,3}

Step-by-step explanation:

// Solve equation [2] for the variable y

[2] 4y = 2x - 4

[2] y = x/2 - 1

// Plug this in for variable y in equation [1]

[1] 3x - 4•(x /2-1) = 12

[1] x = 8

// Solve equation [1] for the variable x

[1] x = 8

// By now we know this much :

x = 8

y = x/2-1

// Use the x value to solve for y

y = (/2)(8)-1 = 3

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Which binomials are a difference of squares?

kow [346]

Answer:

Options B and C.

Step-by-step explanation:

Difference of squares is defined as

$a^2-b^2$

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It is sum of squares.

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It is difference of squares.

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It is not a difference of squares.

Therefore, the correct options are B and C.

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4 years ago

This pattern follows the "add 3" rule. What is the next number in the pattern?

azamat

Answer:

Step-by-step explanation:

3,6,9,12,15,18

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3 years ago

Read 2 more answers

Determine whether the following is an example of a sampling error or a non-sampling error. 12% of all people are left handed. A

const2013 [10]

Answer:

Sampling Error

Step-by-step explanation:

When the researcher randomly selected 200 people, he is creating an sample or subset from the population, that would be all the people in the earth. The error obtained was product of the fact that the analysis he made was estimated from the sample and not the whole population. There is no other mentioned factor that could cause an error, so the answer would be a sampling Error.

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3 years ago

Square root of 784 by prime factorization

Digiron [165]

Answer:

Step-by-step explanation:

Hello,

we can divide 784 by 2 and then again by 2 etc until we find all the terms as below

784 = 2*2*2*2*7*7 that we can write

$784=2^47^2$

Then

$\sqrt{784}=\sqrt{2^47^2}=\sqrt{2^4}*\sqrt{7^2}=2^2*7=4*7=28$

hope this helps

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4 years ago

The sales tax for an item was $8.80 and it cost $440 before tax.

PilotLPTM [1.2K]

Answer:

Step-by-step explanation:

In non-mathematical form, the question is asking $8.80 is what percent of $440. N will equal the percent. So, you would set up the equation like this: 20 = N · 440

You need to solve the equation.

20/440 = N · 440/440

0.045 repeating = N

Rounded, the sales tax rate would be 4.5%

6 0

3 years ago