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Vsevolod [243]
3 years ago
9

What is the value of x in the equation 1/3x-2/3 =-18

Mathematics
2 answers:
Margarita [4]3 years ago
3 0
1) 1/3x - 2/3 = -18
2) 1/3x - 2/3 + 2/3 = -18 + 2/3
3) 1/3x = -54/3 + 2/3
4) 1/3x = -52/3
5) (1/3x) divided by 1/3 = -52/3 divided by 1/3
6) x = -52/3 x 3/1
7) x = -52
alisha [4.7K]3 years ago
3 0

Answer:52



Step-by-step explanation:


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The square root of 289 is 17
The square root of 360 is 18.97... which would be rounded to 18
The square root of -90 is 9
8 0
3 years ago
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A set of a thousand numbers has a mean of zero.
Alona [7]

We want to find the mean of two elements in a set, given that we know the other elements of the set and the mean of the whole set.

The answer is: -490

-----------------------------

For a set with N elements {x₁, x₂, ..., xₙ} the mean is given by:

M = \frac{x_1 + x_2 + ... + x_n}{N}

Here we know that:

  • The mean of the set is 0.
  • The set has 1000 elements.
  • 998 of these elements are ones, the other two are A and B.

We want to find the mean of the values of A and B.

First, we can start by writing the equation for the mean:

\frac{1 + 1 + 1 + ... A + B}{1000}  = 0

We can rewrite this as:

1 + 1 + 1 +... + A + B = 0

And we have 998 ones, then:

1 + 1 + 1 +... + A + B = 998 + A + B = 0\\\\B = - 998 - A

Now we have B isolated.

With this, the mean of A and B can be written as:

\frac{A + B}{2}  = \frac{A - 980 - A}{2} = -490

So we can conclude that the mean of the other two numbers is -490.

If you want to learn more, you can read:

brainly.com/question/22871228

5 0
2 years ago
How many 1/3 cups of ice cream can you make from 1/7 cup
OlgaM077 [116]
Well first you have to make the denominators equal by finding a common denominator. in this case 21, but whatever you do to the bottom you do to the top. so 1/3 times 7/7 equals 7/21 and 1/7 times 3/3 equals 3/21.
 
so how many 7/21 cups of ice cream can you make from 3/21 i think  about none but remember i could be wrong
8 0
3 years ago
What is the slope of the line passing through (-3, 5) and (5, -3)?
saveliy_v [14]

we know that

the formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

in this problem we have

A(-3,5)\ B(5,-3)

substitute the values in the formula

m=\frac{-3-5}{5+3}

m=\frac{-8}{8}

m=-1

therefore

<u>the answer is the option</u>

slope=-1

5 0
3 years ago
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Simplify the expression 7-1x-(-5x)-10+4x
Zigmanuir [339]

Answer: 8x-3

Step-by-step explanation:

7-1x-(-5x)-10+4x

7-x+5x-10+4x

Combine like terms

7-10-x+5x+4x

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-3+8x

8x-3

6 0
3 years ago
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