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alexira [117]
3 years ago
8

Mr. pham wrote the equation below on the board.

Mathematics
2 answers:
valkas [14]3 years ago
7 0

18 - 7x = -20.5

Subtract 18 from each side:

-7x = -38.5

Divide both sides by -7:

x = -38.5 / -7

x = -5.5 = 5 1/2

The answer is D.

melisa1 [442]3 years ago
7 0

Answer:

D. 5 1/2

Step-by-step explanation:

18-7x=-20.5

Subtract 18 from each side

18-18-7x=-20.5-18

-7x = -38.5

Divide each side by -7

-7x = -38.5/-7

x =5.5

In fraction form

x = 5 1/2

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Inequality question plz help
Serjik [45]

Answer:

C. x<18

Step-by-step explanation:

If you substituted the inequalities with 5, the logical one is x<18.

Especially since 5 is less than 18, it isn;t greater than or less than 2,9, or 42.

4 0
3 years ago
Resolva os sistemas abaixo <br> 2x+3y=80<br> 3x+2y=70<br><br><br><br> X=8y<br> X+4y=480
timurjin [86]
Solución 1: 2(x) + 3(y) = 80
solución 2: 3(x) + 2(y) = 70

3(y) + 2(x) = 80
2(y) + 3(x) = 70

2y = -3x + 70
y = -3x÷2 + 35

2x + 3(-3x÷ 2+35) = 80  
-5x÷2 = -25  
-5x = -50

5x = 50   
x-intercept: 10 
x = 10  
y = -3x÷ 2+35

  y = -(3÷2)(10)+35 = 20 

x-interpcet: 10
y-intercept: 20
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
solución: x - 8y = 0
solución x + 4y = 480

-8y + x = 0
4y + x = 480

x-intercept (solución 2)
x = -4x + 480

x-intercept (solución 1)
4y + 180 - 8y = 0
-12y = 480

y-intercept: 40
x-intercept: 320


Buena Suerte!


7 0
3 years ago
Please help asap! Due tonight!
Ugo [173]
The answer may be 10
5 0
2 years ago
What is the the total cost of a book that is $45.60 with a sales tax of 7.5%
sineoko [7]
3.42 multiply 45.60 by 0.075


6 0
3 years ago
If <br><br><br> Plz help ASAP! Thank you
Licemer1 [7]

Answer:

hi

Step-by-step explanation:

hi

6 0
2 years ago
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