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3 years ago

Solve this 6r+7=13+7r

Mathematics

2 answers:

Arisa [49]3 years ago

6 0

6r + 7 = 13 + 7r
- 6r - 6r
 7 = 13 + r
 - 13 - 13 
 -6 = r

alex41 [277]3 years ago

3 0

Let's move all to one side:

6r+7-13-7r=0

and re-arrange to have similar terms together:
6r-7r +7-13=0

let's add up what we can:

-1r-6=0
we can move the -6 to the other side and multiply both sides by -1 and we get:
r=-6 This is the solution.

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X+y= -9 x+2y= -25 According to the system of equations above, what is the value of y?

Varvara68 [4.7K]

Try this option:
if x+y=-9 is I (one)
and x+2y=-25 is II (two), then
if II-I, then (x+2y)-(x+y)=-25+9 ⇔ y=-16.

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3 years ago

Can two lines be drawn from a point not on a line that will meet the line at a right angle? at a 45° angle? explain each answer.

vichka [17]

I believe the the correct answer would be yes. Two lines can be drawn from a point that is not collinear with a certain line that will meet the line at a right angle or 90 degree angle and at an angle of 45 degrees. We can freely draw any line that would pass through a given point and would cross a given line at any direction giving us different angles and this would include a 90 and 45 degree angle.

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2 years ago

The slope of the line below is 0.8. Write the equation of the line in point-slope

AlexFokin [52]

The equation of the line is y = 0.8x - 1.4 if the slope of the line is 0.8 and line passes through coordinates (-2,-3)

<h3>What is a straight line?</h3>

A straight line is a combination of endless points joined on both sides of the point.

The slope 'm' of any straight line is given by:

$\rm m =\dfrac{y_2-y_1}{x_2-x_1}$

The slope m = 0.8

The line passing through coordinates (-2,-3)

y = mx + c

y = 0.8x + c

Plug the point in the equation.

-3 = 0.8(-2) + c

c = -1.4

y = 0.8x - 1.4

Thus, the equation of the line is y = 0.8x - 1.4 if the slope of the line is 0.8 and line passes through coordinates (-2,-3)

Learn more about the straight line here:

brainly.com/question/3493733

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1 year ago

Sketch the graph of 5x+7y=35, include the intercepts

zhenek [66]

Slope intercept form: y= −5 7 x+5

The graphing points would be (0,5)(7,0)

7 0

2 years ago

Read 2 more answers

What values of y satisfy this equation? 3y - 14 = 16

TiliK225 [7]

Answer:

By making y alone

Step-by-step explanation:

3y-14=16

+14 +14

3y= 30

divide 3 on both sides

y=10

Hope this helps!

6 0

3 years ago