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New! - Multiplication game - catch the hodag!


Adding and subtracting with negatives activity


Factoring Game


If y varies directly as x and y = 15 when x = 5, find the value of y when x = 6.
How to solve:
Direct Variation Formula: y = kx
Substitute 5 for x and 15 for y:   15 = k(5)
Solve for k:
(Divide both sides by 5)
3 = k
New equation:
(Substitute 3 for k)
y = 3x
Substitute 6 for x: y = 3(6)
Answer: y = 18

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