exam Maths Puzzle Numerical Ability

Determine the augmented matrix:p+s+c=600; 12p+10s+8c=5900; 0-s+c=175

Solve for the matrix and please show all work.

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exam Other Question

Can you help me plot the graph to the following functions?

1. f(x)=3^x-2
2. f(x)=log2x
I am so stuck...I can find the vertex, focus, and directrix given the equation but can not do an equation from given properties.

Write the equation of the parabola in stand form