SusCloud SusCloud
  • 14-01-2021
  • Mathematics
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Where do the lines y = 3x + 5 and y = -2x + 10 intersect?

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sqdancefan
sqdancefan sqdancefan
  • 15-01-2021

9514 1404 393

Answer:

  (x, y) = (1, 8)

Step-by-step explanation:

A graphing calculator quickly tells you the point of intersection.

__

You can equate the y-values and solve for x.

  3x +5 = -2x +10

  5x = 5 . . . . . . . . . add 2x-5

  x = 1 . . . . . . . divide by 5

  3·1 +5 = y = 8 . . . . substitute for x in the first equation

The point of intersection is (x, y) = (1, 8).

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