exam Maths Puzzle Numerical Ability

If a bag contains 15 marbles, how many samples of 2 marbles can be drawn from it? How many samples of 2 can be drawn in which both marbles are blue?

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exam Other Question

Solve the following systems by substitution. Example 2 (p 712) and Example 4 (p 713) are the key models to go by for solving these exercises….

16) 5x - 2y = -5
y - 5x = 3
I need to solve the following equations algebraically. Some of my practice problems are as follows. If I could get some answers that would be great so I can be better prepared fo