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Masja [62]
3 years ago
6

Need help don’t understand

Mathematics
1 answer:
Dahasolnce [82]3 years ago
5 0
The slope of the line is -10
Y = -10x + 24
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4/5x = -16
Sveta_85 [38]
<h2>Hello!</h2>

The answers are:

1  x=-20

2  x=-9

3 x=-5 

4  r=-2

5  x=-4.5

<h2>Why?</h2>

To know the solution of the problems, we need to isolate each variable.

Remember that:

- If we have an equality: if the number is subtracting (negative sign), and if you need to move it to the other side of the equality, its sign changes to positive.

- If we have an equality: if the number is adding (positive sign), and if you need to move it to the other side of the equality, its sign changes to negative.

- If we have  an equality:  if the number is part of a product , and if you need to move it to the other side of the equality, the same number will be dividing the factors of the side. On the opposite, if the number is dividing, it will be multiplying on the other side of the equality.

So,

1 - Solving for "x"

\frac{4}{5}x=-16\\x=\frac{-16}{\frac{4}{5} }=-16*\frac{5}{4}=-20\\x=-20

2 - Solving for "x"

-3x+4=31\\-3x=31-4=27\\x=\frac{27}{-3}=-9

3 - Solving for "x"

2x+(-12)=-22\\2x-12=-22\\2x=-22+12=-10\\\\2x=-10\\x=\frac{-10}{2}=-5

4  - Finding the solution

25=15-5r\\25-15=-5r\\-5r=10\\r=\frac{10}{-5}=-2

5 - Finding the solution

12.5+5x=-10\\5x=-10-12.5=-22.5\\5x=-22.5\\x=\frac{-22.5}{5}=-4.5

Have a nice day!

8 0
4 years ago
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What is the average of 62 and 127
Ganezh [65]

Answer:

Step-by-step explanation:

The answer is 94.5

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3 years ago
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What is the unit price of a 16-ounce box of cereal that sells for $2.48?
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Answer:

0.155

Step-by-step explanation:

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For the inverse variation equation p=8/V, what is the value of V when p=4?
mafiozo [28]
4 = 8 / V
4V = 8
V = 8/4
V = 2
6 0
3 years ago
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An animal shelter spends $2.00 per day to care for each cat and $6.50 per day to care for each dog. Amelia noticed that the shel
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Answer:

its 2 cats

Step-by-step explanation:

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