A yacht sails 5km due west and then 8km due south. How far is it from it's starting point?

√89 km

Step-by-step explanation:

By applying Pythagoras theorem,

x² = 25+64

=89

Think about it on a graph. Plot down your cardinal points on the X and y axis, and plot the path the yacht would take. It would end up forming a triangle, in which case the length you travel is the hypotenuse.

the answer is 5/3x+7/5y+7

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.