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ziro4ka [17]
2 years ago
11

) Tara earns twice as much per hour as Kayte.

Mathematics
2 answers:
tekilochka [14]2 years ago
8 0

Answer:

Austin's hourly wage is $8.

Step-by-step explanation:

We can write this problem as a system of linear equations.

We define T: Tara's hourly wage, A: Austin's hourly wage and K: Kayte's hourly wage.

Then, if Tara earns twice as much per hour as Kayte, we have:

T=2K

If Kayte earns $3 more per hour than Austin, we have:

K=A+3

And if they earn $41 per hour as a group, we know:

T+K+A=41

We can use all equations to replace in the third one, as:

T+K+A=41\\\\(2K)+K+A=41\\\\3K+A=41\\\\3(A+3)+A=41\\\\3A+9+A=41\\\\4A=41-9=32\\\\A=32/4=8

Austin's hourly wage is $8.

Cerrena [4.2K]2 years ago
5 0

Answer:

Austin's hourly wage is $8.

Step-by-step explanation:

This question can be solved using a system of equations.

I am going to say that:

Tara's hourly wage is x.

Kayte's hourly wage is y.

Austin's hourly wage is z.

Tara earns twice as much per hour as Kayte.

This means that x = 2y

Kayte earns $3 more per hour than Austin.

This means that y = z + 3

As a group, they earn $41 per hour.

This means that x + y + z = 41

What is Austin's hourly wage?​

This is z.

x + y + z = 41

y = z + 3 and x = 2y, so x = 2(z + 3) = 2z + 6

x + y + z = 41

2z + 6 + z + 3 + z = 41

4z + 9 = 41

4z = 32

z = \frac{32}{4}

z = 8

Austin's hourly wage is $8.

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we know that

Step 1

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ZY=21\sqrt{3}\ units

Step 2

in the right triangle XYZ

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we know that

tan\ 60=\frac{opposite\ side\ angle\ 60}{adjacent\ side\ angle\ 60}

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opposite side angle 60 is ZY

adjacent side angle 60 is XZ

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therefore

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\sqrt{3}


3 0
1 year ago
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Which system of equations can be used to find the roots of the equation 12 x 3-5x=2 x 2+x+6
kirill [66]

Answer:

Option (a) is correct.

The system of equation becomes

y=12x^3-5x\\\\ y=2x^2+x+6

Step-by-step explanation:

Given : Equation  12x^3-5x=2x^2+x+6

We have to construct a  system of equations that  can be used to find the roots of the equation 12x^3-5x=2x^2+x+6

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To construct a system of equation put both sides of the given equation equal to a same variable.

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12x^3-5x=y=2x^2+x+6

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Option (a) is correct.

   

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1 year ago
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Find the dimensions of the box with volume 1728 cm3 that has minimal surface area. (Let x, y, and z be the dimensions of the box
Gala2k [10]

Answer:

The dimensions of the box are 12 cm , 12 cm , 12 cm

Step-by-step explanation:

Let x , y and z be the dimensions of box

Volume of box =xyz=1728

z=\frac{1728}{xy}

Surface area of box = 2xy+2yz+2xz=2xy+2y(\frac{1728}{xy})+2x(\frac{1728}{xy})

Let f(x,y)=2xy+2(\frac{1728}{x})+2(\frac{1728}{y})

To get minimal surface area

\frac{\partial f}{\partial x}=0 and \frac{\partial f}{\partial y}=0

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\frac{\partial(2xy+2(\frac{1728}{x})+2(\frac{1728}{y}))}{\partial y}=0

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Using 1

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Side can never be 0

So,x^3=1728

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The dimensions of the box are 12 cm , 12 cm , 12 cm

5 0
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kozerog [31]

Answer:

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(c) 0.6052

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Step-by-step explanation:

probability density function of the time to failure of an electronic component in a copier (in hours) is

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P(x>3000) = 1 − e^−3000/1076

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B) A component fails in the interval from 1000 to 2000 hours:

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P(x<1000) = 0.6052

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e^−x/1076 = 0.1

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1 year ago
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gregori [183]
225 is not a perfect cube

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