book Maths Puzzle Numerical Ability

if x=5, what does 2x^2 + x equal?

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book Other Question

a clothing store's regular price for a suit is $225.00. during a storewide sale, the suites were priced at $160.00. use the formula s=r-d where s is the sale price, r is the regula Can you please help?

Two problems:

-x^2 -2x/x + 1 < 0

7x -1 / x^2 - 1 < 0