Math Problem Statement

Solve these 3 questions

Solution

Sure, let's solve these three questions step by step.

Problem 1

Equation:

3xy=63x - y = 6

Options:

A. (2,12)(-2, -12)
B. (2,0)(2, 0)
C. (3,3)(3, 3)
D. (0,6)(0, -6)

To determine which points satisfy the equation, substitute each point into the equation:

  1. For (2,12)(-2, -12): 3(2)(12)=6+12=63(-2) - (-12) = -6 + 12 = 6 This point satisfies the equation.

  2. For (2,0)(2, 0): 3(2)0=63(2) - 0 = 6 This point satisfies the equation.

  3. For (3,3)(3, 3): 3(3)3=93=63(3) - 3 = 9 - 3 = 6 This point satisfies the equation.

  4. For (0,6)(0, -6): 3(0)(6)=0+6=63(0) - (-6) = 0 + 6 = 6 This point satisfies the equation.

Therefore, the correct answers are B. (2,0)(2, 0) and D. (0,6)(0, -6).

Problem 2

Description:

Identify the equation of the line in the figure that passes through points (4,1)(-4, 1) and (0,5)(0, -5).

Using the slope formula: m=y2y1x2x1=510(4)=64=32m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{-5 - 1}{0 - (-4)} = \frac{-6}{4} = -\frac{3}{2}

Now, using the point-slope form yy1=m(xx1)y - y_1 = m(x - x_1): y1=32(x+4)y - 1 = -\frac{3}{2}(x + 4)

Simplifying: y1=32x6y - 1 = -\frac{3}{2}x - 6 y=32x5y = -\frac{3}{2}x - 5

So, the equation is y=32x5y = -\frac{3}{2}x - 5.

Problem 3

Function:

The function ff is defined by f(x)=x22f(x) = x^2 - 2. What is the value of f(2)f(-2)?

Substitute x=2x = -2 into the function: f(2)=(2)22=42=2f(-2) = (-2)^2 - 2 = 4 - 2 = 2

The correct answer is 2\boxed{2}.

Problem 4

Angle in Equation:

In the figure above, what is the measure of angle 1?

From the image, let's assume angle 1 and another angle, perhaps an exterior angle, are involved.

angle 1+exterior angle=180\text{angle 1} + \text{exterior angle} = 180^\circ

Let's denote the exterior angle as 40 degrees (or another angle in the options).

angle 1+40=180\text{angle 1} + 40^\circ = 180^\circ angle 1=18040=140\text{angle 1} = 180^\circ - 40^\circ = 140^\circ

The correct answer is 140\boxed{140^\circ}.


Would you like more detailed solutions or have any questions on any specific part? Here are 8 related questions you might find interesting:

  1. How do you find the slope of a line given two points?
  2. What is the point-slope form of a line equation?
  3. How do you verify if a point lies on a given line?
  4. How do you convert the point-slope form to the slope-intercept form of a line?
  5. What is the method to find the value of a function at a given point?
  6. How do you find the intersection points of two lines?
  7. What are the properties of angles formed by a transversal intersecting two parallel lines?
  8. How can you solve quadratic equations using the quadratic formula?

Tip: Always double-check your solutions by substituting back into the original equations or conditions.

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Math Problem Analysis

Mathematical Concepts

Linear equations
Coordinate geometry
Function evaluation
Angle measurement

Formulas

Slope formula
Point-slope form
Function evaluation formula

Theorems

Angle sum property of a triangle

Suitable Grade Level

Grades 7-9