SAT Equations

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Last updated 7:36 PM on 7/20/26
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13 Terms

1
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Slope

y = mx + b

2
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Circle

(x-h)² + (y-k)² = r²

3
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Percent Change

(New-Old / Old) x 100

4
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Discriminants

b² -4ac > 0 = 2 real solutions

b² -4ac = 0 = one solution

b² -4ac < 0 = 2 nonreal solutions

5
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Vertex Form

y = a(x-h)² + k

6
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Sum/Product of roots

-b/a = sum

c/a = product

7
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Distance Formula

d = ( (x2 - x1) + (y2 - y1) )^1/2

8
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Midpoint Formula

(x1 + x2 / 2) , (y1 + y2 /2)

9
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Sin/Cos of Complementary Angles

sin(x°) = cos(90° - x°)

sin(θ°) = cos(pi/2 - θ°)

10
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Exponential Growth/Decay

A = P(1 ± r)^t

P = initial amount

R = g/d rate in decimal

t = time interval

11
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Degrees/Radians

d = r x 180/pi

r = d x pi/180

12
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Arc Length

s = rx

s=arc

r=radius

x=central angle

13
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