3 years ago

Evaluate 4(2a - b) when a = -1 and b = 5 A -48 B -28 C -12 D 32

1 answer:

7 0

I'd suggest you enclose -1 and 5 within brackets as shown:

4( 2[-1] - [5] ). Do the work within parentheses FIRST: 4( -7 ).
Then multiply as indicated: -28

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Calcula para la razón trigonométrica considerando la razón correspondiente del ángulo opuesto:Sen (-45º)

Lostsunrise [7]

Answer:

$sen(-45^{o})-\frac{\sqrt{2}}{2}$

Step-by-step explanation:

Para resolver este problea podemos comenzar con las identidades pares e impares, las cuales nos dicen que:

sen(-u)=-sen(u)

por lo que podemos reescribir nuestro problema como:

sen(-45°)=-sen(45°)

Luego podemos tomar los triángulos comunes (ver imagen adjunta).

y calcular la razón de seno en donde:

$sen \theta = \frac{opuesto}{hipotenusa}$

para obtener:

$sen(-45^{o})=-\frac{1}{\sqrt{2}}$

ahora podemos racionalizar la fracción para obtener:

$sen(-45^{o})=-\frac{1}{\sqrt{2}}*\frac{\sqrt{2}}{\sqrt{2}}$

$sen(-45^{o})=-\frac{\sqrt{2}}{2}$

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3 years ago

2 divided by one third

Jobisdone [24]

2 / 1/3
= 2* 3/1
= 2*3
= 6

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In this isosceles trapezoid, what is x if the length of the longer base is 17 and the length of the shorter base 12? The length

lesantik [10]

Answer:

good question add 17+10+12

Step-by-step explanation:

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4 years ago

at 43 years old, your uncle is 6 years younger than your mother. How old is your mother. Write an expression

SashulF [63]

The mother is 49 years old because 43+6=49

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What are you trying to find out the length of

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