exam Maths Puzzle Numerical Ability

Addition and Subtraction of Rational Expressions

Add or subtract the following:

Z+3 +7
________
2 2

3-Z-4
______
Z Z

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exam Other Question
Could you please help me solve for the following problem

Find the corresponding y values for x = -4, -3, -2, -1, 0, 1, 2 if y=x squared plus 2x minus 3.

Could you please show your work.

Thank You Please help to solve...

There are 26 nickels, dimes and quarters in all, and their value was $2.25. how many coins of each type were there if there were 10 times as many nickels as quarters?