book Maths Puzzle Numerical Ability

. Solve the system by graphing and state the coordinates of the solution in words:
x - 2y = 8 and x + y = - 1

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book Other Question

Evaluate the determinant

2 -1 -3
5 9 4
7 6 -2 Jill Loves math but she hates this problem
The sum of four numbers is 64.
If you add 3 to the first number,3 is subtracted form the secong number the third is multiplied by 3 and