exam Maths Puzzle Numerical Ability

how do you factor this

2x^2-x-10

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exam Other Question

Please help solve for y

(y-5)/(x+2) = -7/4 Find the slope and the y-intercept.
y = 4x - 2

The answer I came up for this one is 2 for the slope. Is this correct? If not could you show me what I did wrong and explain how to find the slope and y-intercept. Thanks for your time and help.