Math Problem Statement

Given the following equations, at which point will the graphs intersect?

Solution

To find the point at which the graphs of f(x)=5x+1f(x) = 5x + 1 and g(x)=2x+15g(x) = -2x + 15 intersect, we need to set the two equations equal to each other and solve for xx.

Step 1: Set f(x)f(x) equal to g(x)g(x)

5x+1=2x+155x + 1 = -2x + 15

Step 2: Solve for xx

First, add 2x2x to both sides: 5x+2x+1=155x + 2x + 1 = 15 7x+1=157x + 1 = 15 Next, subtract 1 from both sides: 7x=147x = 14 Now, divide by 7: x=2x = 2

Step 3: Find yy by substituting x=2x = 2 into either equation

Using f(x)=5x+1f(x) = 5x + 1: f(2)=5(2)+1=10+1=11f(2) = 5(2) + 1 = 10 + 1 = 11

So, the graphs intersect at the point (2,11)(2, 11).

Thus, the correct answer is (2,11)(2, 11).

Would you like more details or have any questions?

Here are some related questions:

  1. How do you solve systems of equations graphically?
  2. What does it mean when two graphs intersect?
  3. How do you find the slope of a line given its equation?
  4. How do you interpret the y-intercept of a linear equation?
  5. Can two lines with different slopes ever be parallel?

Tip: When solving for intersection points, setting the two equations equal to each other is a key step!

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Intersection of Graphs

Formulas

y = mx + b

Theorems

Slope-Intercept Form

Suitable Grade Level

Grades 8-10