exam Maths Puzzle Numerical Ability

HI, I am having trouble with these question. Any help will be apreciated ;)



What system of equations could your enter on your graphic calculator to solve the exponential equation 6^x-1=7

thanks

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exam Other Question

P=2L + 2W (for the L) How would I find the distance to the nearest hundredth between the points (-6-5) and (-1,3)?
thanks much!