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3 years ago

Solve for x -2(4x-3)=30 X=-2 X=-3 X=-4 X=-6

Mathematics

2 answers:

Sergio039 [100]3 years ago

8 0

Answer:

Step-by-step explanation:

x-2(4x-3)=30

x-8x+6=30

-7x=30-6

-7x=24

x=-24/7 maybe it is a mistake in the statement of the problem

vlabodo [156]3 years ago

4 0

You have to do the numbers in the parathense which is x-8x+6=30
Then you have to combine like terms -7x+6=30
Move the constant to the right which will be -7x=30-6
Then you subtract the numbers -7x=24
Divide both sides by -7 so it equals x=-24/7
Which equals x=-4

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jek_recluse [69]

Answer: The answer is leg(s).

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3 years ago

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Answer:

(0.5, -2.5)

Step-by-step explanation:

Each of the coordinates of B(1, -5) is multiplied by the scale factor, 0.5:

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3 years ago

PLEASE HELP<br>L has y-intercept (0,5) and is perpendicular to the line with equation y=1/3x+1

marin [14]

Answer:

y=-3x+5

Explanation:

Given a line L such that:

• L has y-intercept (0,5); and

• L is perpendicular to the line with equation y=(1/3)x+1.

We want to find the equation of the line in the slope-intercept form.

The slope-intercept form of the equation of a straight line is given as:

$\begin{equation} y=mx+b\text{ where }\begin{cases}m={slope} \\ b={y-intercept}\end{cases} \end{equation}$

Comparing the given line with the form above:

$y=\frac{1}{3}x+1\implies Slope,m=\frac{1}{3}$

Next, we find the slope of the perpendicular line L.

• Two lines are perpendicular if the product of their slopes is -1.

Let the slope of L = m1.

Since L and y=(1/3)x+1 are perpendicular, therefore:

$\begin{gathered} m_1\times\frac{1}{3}=-1 \\ \implies Slope\text{ of line L}=-3 \end{gathered}$

The y-intercept of L is at (0,5), therefore:

$y-intercept,b=5$

Substitute the slope, m=-3, and y-intercept, b=5 into the slope-intercept form.

$\begin{gathered} y=mx+b \\ y=-3x+5 \end{gathered}$

The equation of line L is:

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1 year ago

(3x + 5y = 7<br> { 4x - y = 5

dalvyx [7]

Answer:

Step-by-step explanation:

Solution by substitution method

3x+5y=7

and 4x-y=5

Suppose,

3x+5y=7→(1)

and 4x-y=5→(2)

Taking equation (2), we have

4x-y=5

⇒y=4x-5→(3)

Putting y=4x-5 in equation (1), we get

3x+5y=7

⇒3x+5(4x-5)=7

⇒3x+20x-25=7

⇒23x-25=7

⇒23x=7+25

⇒23x=32

⇒x=32/23

→(4)

Now, Putting x=32/23

in equation (3), we get

y=4x-5

⇒y=4(32/23)-5

⇒y=(128-115)/23

⇒y=13/23

∴y=13/23 and x=32/23

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2 years ago

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3 years ago

Read 2 more answers