exam Maths Puzzle Numerical Ability

solve each of the following systems of linear equations for variables x,y,and z. You may use any method.

A.

-2x + 2y - 3z = 2
1x + 4y = 10
2x + 1y +1z = 9

B.

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exam Other Question

Could I please get some additional help with the following problem:

Write
A=pi/4 as an equation in rectangular coordinates, (x,y)
Thank You,
RF Given f(x)=x^2+2x+1 find f(x+h) and simplify how can i figure this out if only f is given to me and not h?