exam Maths Puzzle Numerical Ability

Solve the following 2 x 2 systems using substitutions

2x - 7y =21
5x+ 3y = 73

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exam Other Question

WORD PROBLEM : There are 10 women and 8 men in a club. How many diferent committees of 6 each can be selected from the group if equal number of men and women are to be on the committee? PLEASE HELP ME SOLVE!!!! This is pre-test question that is not in the book.
The function S(t) =239.2-11.5t can be used to estimate the total Cuban sales of windshield-wiper fluid, in thousands of dollars