Math Problem Statement

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Solve the equation -10x + 2y = -20 using a graph.

Solution

To solve the equation 10x+2y=20-10x + 2y = -20 and find the ordered pairs for the table provided, let's break it down:

  1. Substitute x=0x = 0 into the equation: 10(0)+2y=20-10(0) + 2y = -20 Simplifying this: 2y=202y = -20 Now, divide by 2: y=10y = -10 So, when x=0x = 0, y=10y = -10. The ordered pair is (0,10)(0, -10).

  2. Substitute y=0y = 0 into the equation: 10x+2(0)=20-10x + 2(0) = -20 Simplifying this: 10x=20-10x = -20 Now, divide by -10: x=2x = 2 So, when y=0y = 0, x=2x = 2. The ordered pair is (2,0)(2, 0).

Thus, the table would be filled out as follows:

xxyyOrdered Pair
0-10(0,10)(0, -10)
20(2,0)(2, 0)

For the graph, you would plot the points (0,10)(0, -10) and (2,0)(2, 0), then draw a straight line passing through these two points.

Would you like more details on graphing, or have any further questions? Here are five questions to deepen understanding:

  1. How do you determine the slope of a line from two points?
  2. Can you find more points on the line using the slope-intercept form?
  3. What is the slope of the line 10x+2y=20-10x + 2y = -20?
  4. How can you convert 10x+2y=20-10x + 2y = -20 into slope-intercept form?
  5. How would you graph more complex linear equations?

Tip: For graphing lines, it helps to find the intercepts (where the line crosses the x- and y-axes), which we just did by setting x=0x = 0 and y=0y = 0.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

Linear equation: ax + by = c

Theorems

Intercept theorem for finding x- and y-intercepts

Suitable Grade Level

Grades 8-10