exam Maths Puzzle Numerical Ability




– 5[1 – 7] ÷ (-6) + 1
im not sure how to solve this i did it on a scientific cal. and i got -4 and i had a friend do it and she got 5 and 4 6ths. i when i do it and work it out i get 2 so any help would be appreciated.

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can you please help me in these solution I really i appriciated thank you

1) Multiply: [(1/4)z + (1/3)][(1/4)z - (1/5)]



2)Simplify and evaluate:
(22x5y-3z4/40x-2y-8z5)3
thank you so much how do I graph 2y+5x=-2

I came up with (0,-1) and (-2/5,0) but do not know if it is correct and if so how to graph