exam Maths Puzzle Numerical Ability

3b+2a=2 and -2b+a=8

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exam Other Question

Can I please get some help with this word problem?


The price of an item is given by p = 2x^2 - 100. Find the polynomial that represents the rvenue generated from the sale of x items.

Thanks.
Can someone show me how to solve by the substitution method. Thanks!

5X + 2y = -1
2X - y = -13