exam Maths Puzzle Numerical Ability

Solve each of the following systems by substitution.
McGraw Hill 6th edition, 8.3 # 16.
Thank you so very much for your time!!!!

5x-2y=-5
y-5x=3

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exam Other Question

Evaluate

-c to 2nd power - 5(c to 0 power + d) 2nd power. if c = -3 and 3 = 4
factor:

15x^2 + 31x + 10