Solve by Cramcr's rule. Check by Gauss climination and back substi- tution. Show details 2x – 4y = -24 5x + 2y = 0

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Q: One of the roos of the cquation x+3x-6=0 1s

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A: -2x+3y-z=1x+2y-z=4-2x-y+z=-3 Here, D=-2  3 -1  1  2 -1-2 -1    1,  Dx=  1  3 -1  4  2 -1-3 -1    1,…

Q: b. Find the length marked x. 2, 6 3x * + 10

A: We have the property : 6•3x = 2•(x+10) So, 18x = 2x + 20 So, 16x = 20 So, x = 20/16 So, x = 5/4

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.