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Eddi Din [679]
3 years ago
9

How do i solve 3x-5y=9;x=-1,0,1

Mathematics
1 answer:
REY [17]3 years ago
7 0
For x = -1, 3(-1) - 5y = 9 => -3 - 5y = 9 => 5y = -3 - 9 = -12 => y = -12/5 = -2.4
for x = 0, 3(0) - 5y = 9 => -5y = 9 => y = 9/-5 = -1.8
for x = 1, 3(1) - 5y = 9 => 3 - 5y = 9 => 5y = 3 - 9 = -6 => y = -6/5 = -1.2
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What is the equation for the points (-2,3) (1,9) on a graph
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Answer:

  • y -9 = 2(x -1) . . . point-slope form
  • y = 2x +7 . . . . slope-intercept form
  • 2x -y = -7 . . . . standard form

Step-by-step explanation:

Perhaps you want the equation of the line that goes through these two points.

The slope of the line can be found using the formula ...

  m = (y2 -y1)/(x2 -x1)

  m = (9 -3)/(1 -(-2)) = 6/3 = 2

We can use one of the points to write the equation in point-slope form:

  y -k = m(x -h) . . . . . . . . line with slope m through point (h, k)

For slope 2 and point (1, 9) the equation is ...

  y -9 = 2(x -1) . . . . equation in point-slope form

__

We can eliminate parentheses and get y by itself to put the equation into slope-intercept form.

  y -9 = 2x -2

  y = 2x +7 . . . . . . equation in slope-intercept form

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With a little further rearranging, we can put this into standard form. We can get that by adding -7-y to both sides of the equation.

  2x -y = -7 . . . . . equation in standard form

5 0
3 years ago
19+4n<br><br> But "n=4"<br><br> IF YOU DON'T EXPLAIN OR PUT A FAKE ANSWER YOU WILL BE REPORTED
salantis [7]
Sub the number in
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8 0
3 years ago
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Molodets [167]
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vfiekz [6]

Answer:

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Step-by-step explanation:

5 * (2/3) = 10/3 = 3 1/3 pizzas

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