Find solution to the system of linear equations. 8x1 + 4x2 = 4 , 4x1 + 2x2 = 2

x1 = -1 and x2 = 3

Step-by-step explanation:

The value of x1 and x2 is gotten by trial and error

When x1 = -1 and x2 = 3

Substitute these values into the first equation

8x1 + 4x2 =4

8(-1) +4(3)

-8 + 12 = 4

4 = 4

Therefore, x1 = -1 and x2 = 3 satisfy the first linear equation

Also, substitute x1 = -1 and x2 = 3 into the second equation

4x1 + 2x2 =2

4(-1) + 2(3)

-4 + 6 = 2

2 = 2

x = -1 and x2 = 3 also satisfy the second linear equation

the answer is the third / last answer

step-by-step explanation:

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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step-by-step explanation: