book Maths Puzzle Numerical Ability

Use a reflection to argue that the base angles of an isosceles triangle are congruent.

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book Other Question

Please help me with this word problem:

A boat travels 25 km upstream. On the return trip downstream, the boat traveled 5km per hour faster. If the trip took 10 min. less time, w
plot the graph of the following function and what is the range:

y=5/x, domain = {x: 0.4 less than or equal to x less than or equal to 10}