exam Maths Puzzle Numerical Ability

Sam emptied his collection of nickels and dimes on his bed. If his 46 coins were worth $3.10,how many coins of each type did he have?

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exam Other Question

put equations into y= and change them so they are shaded inequalities - I have no idea what this is talking about !!!! HELP PLEASE
y<=1/2x+8
y>-2x+4
y>2x+4
THANKS Is (x-2) a factor of 3x^4+6x^3-30x^2+16x-8? Why or Why not?