Math Problem Statement

even number answers only

Solution

Let's solve the even-numbered exercises from the provided image.

Numeric Section

38. 4x3y=124x - 3y = 12

To find the x-intercept, set y=0y = 0: 4x=12    x=34x = 12 \implies x = 3 The x-intercept is (3,0)(3, 0).

To find the y-intercept, set x=0x = 0: 3y=12    y=4-3y = 12 \implies y = -4 The y-intercept is (0,4)(0, -4).

The points to plot are (3,0)(3, 0) and (0,4)(0, -4).

40. y5=5xy - 5 = 5x

First, rewrite it in slope-intercept form y=mx+by = mx + b: y=5x+5y = 5x + 5

To find the x-intercept, set y=0y = 0: 0=5x+5    5x=5    x=10 = 5x + 5 \implies 5x = -5 \implies x = -1 The x-intercept is (1,0)(-1, 0).

To find the y-intercept, set x=0x = 0: y=5y = 5 The y-intercept is (0,5)(0, 5).

The points to plot are (1,0)(-1, 0) and (0,5)(0, 5).

42. y=73xy = -\frac{7}{3} x

To find the x-intercept, set y=0y = 0: 0=73x    x=00 = -\frac{7}{3} x \implies x = 0 The x-intercept is (0,0)(0, 0), which is also the y-intercept.

Graph Questions Section

44. Find the coordinates of the midpoint of the line segment connecting the two points.

Given the endpoints are (2,3)(2, 3) and (5,1)(5, 1), the midpoint formula is: M=(x1+x22,y1+y22)M = \left( \frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2} \right) M=(2+52,3+12)M = \left( \frac{2 + 5}{2}, \frac{3 + 1}{2} \right) M=(72,42)M = \left( \frac{7}{2}, \frac{4}{2} \right) M=(3.5,2)M = \left( 3.5, 2 \right) So, the midpoint is (3.5,2)(3.5, 2).

46. Find the distance that (5,2)(5, 2) is from the origin. Round to three decimal places.

The distance formula is: d=(x2x1)2+(y2y1)2d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} For the point (5,2)(5, 2) and the origin (0,0)(0, 0): d=(50)2+(20)2d = \sqrt{(5 - 0)^2 + (2 - 0)^2} d=52+22d = \sqrt{5^2 + 2^2} d=25+4d = \sqrt{25 + 4} d=295.385d = \sqrt{29} \approx 5.385 So, the distance is approximately 5.3855.385.

Would you like more details or have any questions? Here are some related questions:

  1. How do you find the slope of a line given two points?
  2. What is the significance of the slope-intercept form of a line equation?
  3. How do you graph a line using its x- and y-intercepts?
  4. How do you find the distance between two points on a coordinate plane?
  5. What are some real-world applications of finding midpoints?
  6. How can you verify the solution to a linear equation?
  7. What is the relationship between the distance formula and the Pythagorean theorem?
  8. How do you convert between different forms of a linear equation?

Tip: When graphing a line, always double-check the intercepts by substituting them back into the original equation to ensure accuracy.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Linear Equations

Formulas

Midpoint formula
Distance formula

Theorems

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Suitable Grade Level

Grades 7-9