book Maths Puzzle Numerical Ability

how do you change from slope intercept to standard form

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book Other Question

Find all positive values for k for which the following can be factored.

x^2 + x - k

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A rectangle is 4 times as long as it is wide. A second rectangle is 5 centimeters longer and 2 centimeters wider than the first. The area of the second rectangle is 270 square cent