exam Maths Puzzle Numerical Ability

lines a and b are perpendicular. THe slope of line a is given. What is the slope of line b?

a is 1

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problem 24 in our self practice i need help


complete the ordered pairs so that each is a solution for the given equation

3x +4y =12 (0, ) , ( ,3 over 4) , ( ,0) , (8 over 3, )
State which method should be applied as the first step for factoring the polynomial 6x^3+9x...

Factor completely...
1. 6b^4-18b^3-60b^2
2. 5a^2-125
3. y^3-12y^2+36y
4. b^2-ab-6a^2
5. 8m^4n-16mn^4