ALEKS placement test formulas

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Last updated 6:35 PM on 7/21/26
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15 Terms

1
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Slope Formula

m = (y₂ - y₁) / (x₂ - x₁)

2
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Slope-Intercept Form

y = mx + b

3
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Point-Slope Form

y - y₁ = m(x - x₁)

4
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Quadratic Formula

x = [-b ± √(b² - 4ac)] / 2a

5
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Pythagorean Theorem

a² + b² = c²

6
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Distance Formula

d = √[(x₂ - x₁)² + (y₂ - y₁)²]

7
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Midpoint Formula

M = ((x₁ + x₂)/2, (y₁ + y₂)/2)

8
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Area of a Triangle

A = ½·b·h

9
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Area of a Circle

A = π·r²

10
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Circumference of a Circle

C = 2·π·r

11
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Simple Interest Formula

I = P·r·t

12
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Compound Interest Formula

A = P(1 + r/n)^(n·t)

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Continuous Compound Interest Formula

A = P·e^(r·t)

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Logarithm to Exponential Conversion

log_b(x) = y <=> b^y = x

15
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Vertex of a Parabola (x-coordinate)

x = -b / (2a)