Math Problem Statement

In the following exercises, find the intercepts for each equation: 37. x - y = 5, 38. x - y = -4, 39. 3x + y = 6, 40. x - 2y = 8, 41. 4x - y = 8, 42. 5x - y = 5, 43. 2x + 5y = 10, 44. 3x - 2y = 12.

Solution

Let's solve each equation to find the x-intercepts and y-intercepts.

37. xy=5x - y = 5

  • x-intercept: Set y=0y = 0. x0=5x=5x - 0 = 5 \quad \Rightarrow \quad x = 5 So, the x-intercept is (5,0)(5, 0).

  • y-intercept: Set x=0x = 0. 0y=5y=50 - y = 5 \quad \Rightarrow \quad y = -5 So, the y-intercept is (0,5)(0, -5).


38. xy=4x - y = -4

  • x-intercept: Set y=0y = 0. x0=4x=4x - 0 = -4 \quad \Rightarrow \quad x = -4 So, the x-intercept is (4,0)(-4, 0).

  • y-intercept: Set x=0x = 0. 0y=4y=40 - y = -4 \quad \Rightarrow \quad y = 4 So, the y-intercept is (0,4)(0, 4).


39. 3x+y=63x + y = 6

  • x-intercept: Set y=0y = 0. 3x+0=6x=23x + 0 = 6 \quad \Rightarrow \quad x = 2 So, the x-intercept is (2,0)(2, 0).

  • y-intercept: Set x=0x = 0. 3(0)+y=6y=63(0) + y = 6 \quad \Rightarrow \quad y = 6 So, the y-intercept is (0,6)(0, 6).


40. x2y=8x - 2y = 8

  • x-intercept: Set y=0y = 0. x2(0)=8x=8x - 2(0) = 8 \quad \Rightarrow \quad x = 8 So, the x-intercept is (8,0)(8, 0).

  • y-intercept: Set x=0x = 0. 02y=8y=40 - 2y = 8 \quad \Rightarrow \quad y = -4 So, the y-intercept is (0,4)(0, -4).


41. 4xy=84x - y = 8

  • x-intercept: Set y=0y = 0. 4x0=8x=24x - 0 = 8 \quad \Rightarrow \quad x = 2 So, the x-intercept is (2,0)(2, 0).

  • y-intercept: Set x=0x = 0. 4(0)y=8y=84(0) - y = 8 \quad \Rightarrow \quad y = -8 So, the y-intercept is (0,8)(0, -8).


42. 5xy=55x - y = 5

  • x-intercept: Set y=0y = 0. 5x0=5x=15x - 0 = 5 \quad \Rightarrow \quad x = 1 So, the x-intercept is (1,0)(1, 0).

  • y-intercept: Set x=0x = 0. 5(0)y=5y=55(0) - y = 5 \quad \Rightarrow \quad y = -5 So, the y-intercept is (0,5)(0, -5).


43. 2x+5y=102x + 5y = 10

  • x-intercept: Set y=0y = 0. 2x+5(0)=10x=52x + 5(0) = 10 \quad \Rightarrow \quad x = 5 So, the x-intercept is (5,0)(5, 0).

  • y-intercept: Set x=0x = 0. 2(0)+5y=10y=22(0) + 5y = 10 \quad \Rightarrow \quad y = 2 So, the y-intercept is (0,2)(0, 2).


44. 3x2y=123x - 2y = 12

  • x-intercept: Set y=0y = 0. 3x2(0)=12x=43x - 2(0) = 12 \quad \Rightarrow \quad x = 4 So, the x-intercept is (4,0)(4, 0).

  • y-intercept: Set x=0x = 0. 3(0)2y=12y=63(0) - 2y = 12 \quad \Rightarrow \quad y = -6 So, the y-intercept is (0,6)(0, -6).


Would you like any more details on these solutions or have further questions?

Follow-up questions:

  1. How do you find the slope of a linear equation from intercepts?
  2. How do x- and y-intercepts help in graphing a line?
  3. What is the general form of a linear equation, and how do you convert it to slope-intercept form?
  4. Can you use the intercepts to check the accuracy of the solution graphically?
  5. What happens when an equation has no x-intercept or no y-intercept?

Tip: Always double-check your intercepts by substituting them back into the original equation to verify!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Intercepts

Formulas

x-intercept: Set y = 0, solve for x.
y-intercept: Set x = 0, solve for y.

Theorems

Intercept form of a linear equation: Ax + By = C

Suitable Grade Level

Grades 8-10