exam Maths Puzzle Numerical Ability

(8x^-5)(-2x^3)^4
I am so confused, could someone please explain.

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exam Other Question

Graph each system of equations using the coordinate plane provided. Then determine whether the system has one solution, no solution, or infinitely many solutions. If the system has one solution, name it.
2x-y=-3
6x-3y=-9 (4, -5) & (-2, -7)