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Algebra (College Entrance Tests)

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Section 1

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z varies jointly with x and y

Front

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SAT Prep

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Date created

Mar 1, 2020

Cards (16)

Section 1

(16 cards)

z varies jointly with x and y

Front

z = kxy

Back

b^e = a (Exponential)

Front

log*ba = e (Logarithmic)

Back

Geometric Series

Front

Sn = a1(1-r^n) / 1-r

Back

Discriminant

Front

b²-4ac POSITIVE: 2 real roots NEGATIVE: 2 complex roots ZERO: 1 real root

Back

z varies directly with x and inversely with y

Front

z = kx/y

Back

Quadratic Formula

Front

x = [-b ± √(b² - 4ac)] / 2a

Back

y varies directly as x

Front

y = kx

Back

Mixture

Front

P1V1 + P2V2 = Pm(V1 + V2) P1A1 + P2A2 = Pm(A1 + A2)

Back

Geometric Sequence

Front

an = a1(r)^n-1

Back

Sum of the Roots

Front

-b/a a = constant of highest degree of x b = constant of 2nd highest degree of x

Back

Arithmetic Sequence

Front

an = a1+(n-1)d

Back

Sum of the Roots

Front

c/a

Back

y varies inversely as x

Front

y = k/x

Back

Arithmetic Series

Front

Sn = n / 2(a1+an) Sn = n/2 [2a1 + (n-1)d]

Back

Work

Front

X/A + X/B = 1

Back

Person-Time-Work

Front

P1T1/W1 = P2T2/W2

Back