1. Solve for x: 3x + 5 = 20
Subtract 5 from both sides, then divide 15 by 3.
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2. What is the slope of y = -2x + 9?
In slope-intercept form y = mx + b, m is the slope.
Open question page3. If f(x)=x²-4, what is f(3)?
Substitute 3 for x: 3 squared minus 4 equals 5.
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