exam Maths Puzzle Numerical Ability

Simplify the rational expression:
x^2 - 3x - 10/ x^2 - x - 20

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exam Other Question

Simplify

square root of 75a^2b^3c.

use absolute value symbols if necessary
Hello,
solve and how to determine if the system is independent, inconsistent or dependent:

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

thks!