exam Maths Puzzle Numerical Ability

can any one help me find the slope for each line? 1. y= -3/4+7 m= 2. x=y m= 3. 3x-8y=4 m=

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exam Other Question

Solve the following sytem by substitution:
4x - 12y = 5
-x + 3y = -1

Thanks What is the difference between 2tanA and tan2A?

Q. If A=30, verify that tan2A = 2tanA / 1-tan sq.A