exam Maths Puzzle Numerical Ability

y=1/2x-3.What is the slope.
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exam Other Question

using the formula log, a = log a/log b find log^2 10000 round your answer to the hundreths place and show your work. I hope someone can please help me with this problem.
Assume the variablex>-9 and use the factx^2+18x+81=(x+9)^2to find x^2+18x+81(there is a square root symbol over the last part