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icang [17]
3 years ago
5

2y+7 ÷ -4y - 10 Evaluate the expression below when y = -3

Mathematics
1 answer:
Nina [5.8K]3 years ago
7 0
2y+7÷-4y-10
2(-3)+7÷-4(-3)-10
-6+7÷12-10
\frac{7}{12}-6-10
\frac{7}{12} -16
= \frac{7}{12} - \frac{192}{12} 
=- \frac{185}{12} 
=-15  \frac{5}{12}
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-3x-y=14<br> 9x- =-27<br><br> Use the method of substitution to solve
eduard

Answer:

The solution to the system of equations is x=3 y= 23  

Step-by-step explanation:

solving this system of equation using substitution method  

 -3x-y=14 …..   equation (1)    

 -9x =-27   ….. equation (2)  

Solving for value of x from equation 2  

-9x =-27    

so x= -27/-9 = 3

so x = 3

The second equation is solved for x, so we can substitute the expression 3 in for x in the first equation (1)

-3x-y=14

-3 (3) - y =14  

-9-y= 14

-9=14+y

y=-23

The solution to the system of equations is x=3 y= -23  

We can check our work by plugging these numbers back into the original equations. Let's try -3x-y=14      

-3x-y=14      

-3(3) -(-23)= 14

-9+23 = 14

14= 14

Yes, our solution checks out.

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3 years ago
Marcos decide abrir una cuenta de ahorro para financiar en el futuro los estudios de su hijo recien nacido. Por suerte, el banco
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Answer:

Resultados debajo

Step-by-step explanation:

Dada la siguiente información:

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Inversión inicial (VP)= $1.000.000

<u>Para calcular el valor final (VF), debemos usar la siguiente formula:</u>

VF= VP*(1 + i)^n

<u>Para 5 años:</u>

VF= 1.000.000*(1,048^5)

VF= $1.264.172,72

<u>Para 18 años:</u>

VF= 1.000.000*(1,048^18)

VF= $2.325.429,02

7 0
3 years ago
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Answer:

35

Step-by-step explanation:

√441 + 784 =

Add 441 and 784

√1225

Simplify

35
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3 years ago
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15*15 = 225

this would then be multiplied by 6 to account for all of the sides of the cube.

225*6 = 1350 millimeters ^2
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3 years ago
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The answer is dilation
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