Math Flashcards

1
Q

a^0?

A

a^0=1

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2
Q

a^-b?

A

a^-b=1/a^b

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3
Q

0^a?

A

0^a=0

Cero a cualquier exponente es cero

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4
Q

Área del triángulo equilatero

A

Raíz de 3/4 a^2

a es el lado al cuadrado

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5
Q

Pitagoras triplet

A

3: 4:5
5: 12:13
8: 15:17

(Todos sus múltiplos )

1: 1:raíz de 2 (45-45-90)
1: raíz de 3:2 ( 30-60-90)

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6
Q

Circunferencia y área del círculo y segmento

A

Círculo:

C= 2pi r

A= pi r^2

Segmento:

C= ángulo/180 (pi r)

A= ángulo/360 pi r^2

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7
Q

Volumen y área del cilindro

A

V= pi r^2 h

Área= 2 pi r (r+h)

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8
Q

Ángulos interiores de un polígono

A

180(n-2)

n = número de lados

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9
Q

Percent change

A

(New-Old)/ Old

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10
Q

Ecuación de línea

A

Y=mx +b

M= inclinación (slope)

B= intercepción con y cuando x=0

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11
Q

Permutación

A

ORDEN SI IMPORTA

nPk= n!/ (n-k)!

n= pool para escoger 
k= número de elementos a tomar
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12
Q

Combinación

A

ORDEN NO IMPORTA

nPk= n!/ (n-k)! k!

n= pool para escoger 
k= número de elementos a tomar
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13
Q

Probabilidad

A

Number desired outcomes/ number of possible outcomes

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14
Q

Slope of a line

A

y2-y1 /x2-x1

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15
Q

Área del trapezoide

A

A=b1+b2 /2.h

Base 1 base 2
H es altura

PILAS PENSAR EN ELEVAR EL TRAPEZOIDE A RECTÁNGULO Y TRIÁNGULO y restar áreas

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16
Q

Inequality multiply or division by a negative

A

Flip the sign of the inequality

17
Q

Average formulas

A

Average= sum of terms/ # of terms

Average= números igualmente espaciados es la mediana

Average= Larger+Smaller/2

18
Q

Number of terms…

A

Number of terms= (Larger- Smaller/ distancia consecutivos) +1

19
Q

Terminated decimal

A

Para ser terminated decimal debe ser dividido por potencia de 2 o de 5

20
Q

Ángulos interiores de un polígono

A

Ángulos interiores=180(n-2)

N=número de lados