What is the equation of the blue line?The answer y = 3x-7 / y = 3(x-4)+5 is wrong

Mathematics

1 answer:

ipn [44]3 years ago

4 0

Answer:

y = 4x -3

Step-by-step explanation:

Here, we want to get the equation of the blue line

As we can see, the y-intercept is -3

So we have the equation as;

y = mx -3

To get the value of m which is the slope , we check for any point on the line

That would be;

(1,1)

Let us have this substituted;

1 = m(1) - 3

1 = m -3

m = 1 + 3

m = 4

so the equation of the straight line is;

y = 4x -3

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PLEASE EXPLAIN!!! NEED HELP!!

serious [3.7K]

We will say 5 units=3 dollars
1/2 of 5 units=3 dollars (just so I don't get confused)
to find 1/3
times both sides by 2/3 to get
1/3 of 5 units=2 dollars
then times 2 both sides
1/3 of 10 units=4 dollars

so the value of 1/3 of 10 is 4

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3 years ago

Find the area of the surface generated by revolving x equals t plus StartRoot 2 EndRoot, y equals StartFraction t squared Over

dezoksy [38]

Find the area of the surface generated by revolving x equals t plus StartRoot 2 EndRoot , y equals StartFraction t squared Over 2 EndFraction plus StartRoot 2 EndRoot t plus 3 , negative StartRoot 2 EndRoot less than or equals t less than or equals StartRoot 2 EndRoot about the y dash axis. The surface area obtained by revolving the given curve around the y dash axis is

???

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3 years ago

Solve the following 1) 2(x + 3) = x - 4 2) 4(5x-2) = 2(9x+3) PLS HELP

gayaneshka [121]

Answer:

(1) $x = -4$ (2) $x = 7$

Step-by-step explanation:

From the first equation:

$2(x + 3) = x - 4\\\implies x = 2(x + 3) + 4\\\implies x = 2x + 6 + 4\\\implies x = 2x + 4\\\implies -4 = 2x - x\\\implies x = -4$

From the second equation,

$4(5x - 2) = 2(9x + 3)\\\implies 20x - 8 = 18x +6\\\implies 20x - 18x - 8 -6 = 0\\\implies 2x -14 = 0\\\implies 2x = 14\\\implies x = \frac{14}{2} = 7$