exam Maths Puzzle Numerical Ability

I^-1 =

a. 0
b. I
c. 1
d. You cannot find the inverse of this matrix

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exam Other Question

Factor Completely

1. 3x^-2x-8

2. 24x^+10x-4

(include the check of your answer using multiplication)(suppose to be factoring the polynomials)

3.2(x+y)^(2)+(x+y)-3 Fine the value of r so the line that passes through each pair of points has the given slope.

(-4,3), (r,5), m=1/4