exam Maths Puzzle Numerical Ability

True or False? The degree of a trinomial is never 4.

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exam Other Question

Graph the inequality
3x+y<=5

y=3x+5

Not sure where to go from here
Multiply as indicated
{x^ + 6x + 9/x^ - 4 * x - 2/x + 3}
{2y^ - + y - 3/4y^ - 9 * 3y + 3/5y - 5y^}
{y^ = y - 42/y - 3 / y + 7/(y - 3)^}