3 years ago

How do you solve linear equations by subsitutions

1 answer:

5 0

1) First, solve one linear equation for y in terms of x .

2) Then substitute that expression for y in the other linear equation.

3)Solve this, and you have the x -coordinate of the intersection.

4)Then plug in x to either equation to find the corresponding y -coordinate.

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Is it ever possible that cos (A−B)=cos ⁡A−cos ⁡B? Why

svetlana [45]

Answer:

yes, there are an infinite number of solutions

Step-by-step explanation:

The attached graph shows values of A and B (x and y) that can make this equation be true. Any of the points on any of the curves will satisfy the equation. (The repetition continues indefinitely in all directions.)