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2 years ago

How do i solve the system of equations by graphing?2x+y=7 x-2y=6

Mathematics

1 answer:

scoray [572]2 years ago

8 0

Answer:

Step-by-step explanation:

1. y = -2x + 7

2. Graph it (Mark (0, 7) or 7 on the y axis and go over one, down two, mark it and draw a line through both)

3. -2y = -x + 6

4. divide entire equation by 2 to isolate y

5. -y = -x + 3

6. multiply entire equation by -1 to make it positive

7. y=x+3

8. graph it (Mark (0,3) and go over one, down one, mark it and draw a line through both new points)

9. Where the lines intersect is your answer

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What expression is equivalent to (3x^2+4x-7)(x-3)

vodka [1.7K]

Answer:

$\arge\boxed{B.\ (3x^2+4x-7)(x)+(3x^2+4x-7)(-3)}$

Step-by-step explanation:

$\text{The distributive property:}\ a(b+c)=ab+ac.\\\\(3x^2+4x-7)(x-3)=(3x^2+4x-7)(x)+(3x^2+4x-7)(-3)$

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2 years ago

How much is the leafy kale? 2.99 times 0.6

NeTakaya

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2 years ago

Four more than twenty-six time a number is equivalent to 12 times the same number less 15.

sesenic [268]

Answer:

n = -19/14

Step-by-step explanation:

Please transcribe this into a symbolic equation:

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2 years ago

A 60 - kilogram person stands on a compression spring . The spring constant is 2500 Newtons per meter .

insens350 [35]

<h2>Answer:0.2352 $m$ </h2>

Step-by-step explanation:

Let the mass of the person be $m$ .

Let the spring constant be $k$ .

Let the displacement in spring be $x$

Let the acceleration due to gravity be $g$

As it is given that the person just stands,the forces are balanced.

So, $mg=kx$

Given,

$m=60Kg\\k=2500Nm^{-1}\\g=9.8ms^{-2}$

$60\times 9.8=2500\times x\\x=\frac{588}{2500}=0.2352m$

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2 years ago

PLEASE HELP ME ON THIS!!!!!!!ASAP!!!!!!!!!!!!!!!!!!

NemiM [27]

Answer:

B is the right answer

Step-by-step explanation:

because of negative 7 on the right it shows that it is down 7

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2 years ago