book Maths Puzzle Numerical Ability

Solve the following systems of equations using the augmented matrix.

3. x-y+3z=-1
2x+y-z=0
3x-4y+z=1

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book Other Question

Find the equation of the line that passes through points (7,-2) and (5,-1)
Write the equation of the line in slope-intercept form.

I know the the slope intercept for is y = mx +b What would you do to simplify a quadratic expression such as 5x^3-27x^2+58x+56?