exam Maths Puzzle Numerical Ability

Please help to solve :

Draw a coordinate plane and place the point (6,-14) on the graph. Label it

thank you

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exam Other Question

Having the hardest time trying to figure these out.

1) reduce to lowest term: 3x-6/8-4x

2)5x/x^2-1 , 4/x^2-2x+1
a. find the LCD
b. Convert each expression into an equivile in a stack of books 81 cm high, we have a total of 21 books. there are 5 cm thick and others of 3 cm thick. how do we each thickness?