exam Maths Puzzle Numerical Ability

Define a variable, write an inequality, and solve each problem.

A number decreased by 17 is less than -13

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exam Other Question

Plot the graph of the equations and interpret the result.

1. 3x - 8y = 5
4x - 2y = 11

2. 4x - 6y = 2
2x - 3y = 1

3. 10x - 4y = 3
5x - 2y = 2 I can not figure out how to write a quadriatic equation where the answer is 3 ax^2+bx+c=0 is the formula

Thanks
Diane