exam Maths Puzzle Numerical Ability

if A = 1/2h(b1 + b2) find b2 if A = 30,h =6 and b1 = 7

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exam Other Question

This question is about augmented matrices. The question says: Set up and solve the following systems of equations using augmented matrices,

3x-2y=8
6x-4y=1 What are the X and Y values? please help me solve this equation: {{{2=1/x^2-1/1+1/x-1}}}