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3 years ago

Solve the system of equations and choose the correct answer from the list of options. (4 points)

Mathematics

2 answers:

Naily [24]3 years ago

5 0

Answer:

SO THE AWNSER WILL BE (B)

Step-by-step explanation:

x − y = 7

y = 3x + 12

2 over 19 comma 2 over 33

negative 2 over 19 comma negative 33 over 2

negative 19 over 2 comma negative 33 over 2

19 over 2 comma 33 over 2

SO THE AWNSER WILL BE (B)

melisa1 [442]3 years ago

4 0

The answer is b (it equals -2/19, -33/2)

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Nataly_w [17]

Answer: G I would say would be the correct answer! Good luck

Step-by-step explanation:

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4 - 5/2 * (1/10x) = 1 what is the value of x

Inga [223]

$4 - 5 / 2 * (1/10x) = 1\\$

The first step is to identify the order in which the equation must be solved, by following PEMDAS (you might know it as BEDMAS):

Parenthesis (or Brackets)

Exponents

Multiplication and Division

Addition and Subtraction

My advice would be to add parenthesis, following these rules, if you are not very good at finding them immediately by sight.

So:

$4 - 5 / 2 * (\frac{1}{10x}) = 1\\\\4 - [(5/2)*(\frac{1}{10x})]=1\\\\4-(2.5*\frac{1}{10x})=1\\\\4-\frac{2.5}{10x}-1=0\\3-\frac{x}{4}=0\\\frac{x}{4}=3\\x=3*4\\x=12$

We check our answer:

$x=12\\4 - [(5 / 2) * (1/10)*(x)] = 1\\4 - [(5 / 2) * (\frac{1}{10}) * (12))] = 1\\4 - [2.5 * (\frac{1}{10})*12] = 1\\4 - [(\frac{2.5}{10})*12] = 1\\4 - [(\frac{1}{4})*12] = 1\\4 - 3 = 1\\1=1$

We are right!

So, $x=12$ .

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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