exam Maths Puzzle Numerical Ability

using the quadratic equation x� - 4x - 5 = 0,
perform the following task:
solve by factoring,
solve by completing the square,
and solve using the quadratic formula

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exam Other Question

Need help on the following problem please?

problem:
determine which variable you will substitute for and rewrite as an equation using one variable?

x + y =6
2x - 3y =9 can you help me set up this problem and solve

the current I in electrical conductor varies inversely as the resistance R of the conductor. suppose I is 0.2 amperes when the resistance is 200ohms. find the current when the resistance is 250ohms.