book Maths Puzzle Numerical Ability

find the values of the following polynomials for the given values of the variable.

-x^2 - 5x - 6

when x = -3

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book Other Question

sole the following word problem by using the system linear equation in two variables:

one number is 3 more than the second number. twice the first is 9 less than 3 times the second How do you graph |x|<3 on a number line?