exam Maths Puzzle Numerical Ability

Can you please help me solve this word problem:

An airplane traveling at 450 mph enters a region with a headwind of 25 mph. How long will it take the plane to travel 950 miles into this wind?

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exam Other Question

equation (1/5)-6=15625 in logarithm form
find the value of x log 2 32=x
express log (x+5) log as the logarithm of a single quanity
I do not understand what they mean when it asks me which linear equation is an indentity or if it is not conditional can you please show me an example?