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Hoochie [10]
3 years ago
11

Hey who ever can help me, I give 25 points

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
5 0

4x+2y=18

-2(2x+3y=15)=-4x-6y=-30

4x+2y=18

-4x-6y=-30

-4y=-12

y=3

2x+3(3)=15

2x+9=15

2x=6

x=3

(3,3)


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likoan [24]

Answer:

Option A

Step-by-step explanation:

The answer is Option A because - \frac{2}{3} j + \frac{1}{5}k can be writen as \frac{1}{5}k - \frac{2}{3}j.

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3 years ago
A guitar string is plucked at a distance of 0.6 centimeters above its resting position and then released, causing vibration. The
liubo4ka [24]

Answer:

The equation that represents the motion of the string is given by:

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y =0.6e^{-1.8t}\cos(2\pi 105t)  

or

y =0.6e^{-1.8t}\cos(210\pi t)  

(a)

The trigonometric function that models the motion of the string is given by:

y =0.6e^{-1.8t}\cos(210\pi t)

(b)

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Using graphing calculator for the equation

y =0.6e^{-1.8x}\cos(210\pi x)

let x = t (time in sec)  

Graph as shown below in the attachment:

we get:

the amount of time t that it takes the string to be damped so that -0.24\leq y \leq0.24 is, 0.5 sec


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ankoles [38]

The answer to number 18 is -  0.25 or 1/4


If you need help with the other ones ask.


<em>Hope this will help :)</em>

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densk [106]

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  1

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