exam Maths Puzzle Numerical Ability

Write an equation in slope-intercept form of the line that is perpendicular to the graph of y=3x+17 and passes through (-7,4)

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exam Other Question

I tried using logarithms, but I was a bit confused??? Help?

4^x = (5^x + 2)^.5
Graph the system of linear inequalities

-x + y < 6
4x + y < -8