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vova2212 [387]
3 years ago
5

Please help me, I have a test tomorrow! Attachment bellow:

Mathematics
1 answer:
katrin2010 [14]3 years ago
8 0

Answer:

1. A    2. B

Step-by-step explanation:

Whatever happens to x must also happen to y.

For the first question, x is doubled, which means that the value of y is also doubled.

For the second question, if the value of x triples, then the value of y triples as well, which means that it would be multiplied by 3.

We can check to see if these two answers are true by inputting values into the equations.

For the first equation, let's use the example x = 2

y = 5(2)

y = 10

If the value if x doubled, it would become x = 4

y = 5(4)

y = 20

As you can see, when the value of x doubled from 2 to 4, the value of y also doubled from 10 to 20.

You can do something similar for the other equation.

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Plssss help???????? don’t understand
ozzi

Answer:

cos N = 7/25 =.28

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

cos theta = adj side / hypotenuse

cos N = MN/ LN

We need to find the ad

Using the Pythagorean theorem

a^2+b^2 = c^2

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3 years ago
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Answer:

a) Escribe un sistema de ecuaciones para representar esta situación.

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Estamos tratando con 2 números

Dejar

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La suma de dos números es 81.

x + y = 81 ...... Ecuación 1

La diferencia de los mismos dos números es 33.

x - y = 33 ....... Ecuación 2

Escribe un sistema de ecuaciones para representar esta situación.

x + y = 81 ...... Ecuación 1

x - y = 33 ....... Ecuación 2

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Restamos la ecuación 2 de la ecuación 1 para eliminar

2y = 48

y = 48/2

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x + 24 = 81

x = 81 - 24

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