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qaws [65]
3 years ago
11

How can i solve -8 = x + 11/ -2

Mathematics
2 answers:
bixtya [17]3 years ago
6 0
Remember you can do anything to an equation as long as you do it to both sides

-8=(x+11)/-2
times both sides by -2
remember that negative tiems negative=positive
16=x+11
minus 11 both sides
16-11=x+11-11
5=x+0
5=x
x=5
Romashka [77]3 years ago
4 0
Rewriting the whole as an Equivalent Fraction :

<span> 2.1 </span>  Adding a fraction to a whole 

Rewrite the whole as a fraction using <span> -2 </span> as the denominator :

x x • -2 x = — = —————— 1 -2

<span>Equivalent fraction : </span>The fraction thus generated looks different but has the same value as the whole 

<span>Common denominator : </span>The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

<span> 2.2 </span>      Adding up the two equivalent fractions 
Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

x • 2 + 11 • -1 2x - 11 ——————————————— = ——————— 2 2 <span>Equation at the end of step  2  :</span> (2x - 11) -8 - ————————— = 0 2 <span>Step  3  :</span>Rewriting the whole as an Equivalent Fraction :

<span> 3.1 </span>  Subtracting a fraction from a whole 

Rewrite the whole as a fraction using <span> 2 </span> as the denominator :

-8 -8 • 2 -8 = —— = —————— 1 2 Adding fractions that have a common denominator :

<span> 3.2 </span>      Adding up the two equivalent fractions 

-8 • 2 - ((2x-11)) -2x - 5 —————————————————— = ——————— 2 2 <span>Step  4  :</span>Pulling out like terms :

<span> 4.1 </span>    Pull out like factors :

   -2x - 5  =   -1 • (2x + 5) 

<span>Equation at the end of step  4  :</span> -2x - 5 ——————— = 0 2 <span>Step  5  :</span>When a fraction equals zero :<span><span> 5.1 </span>   When a fraction equals zero ...</span>

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the <span>denominator, </span>Tiger multiplys both sides of the equation by the denominator.

Here's how:

-2x-5 ————— • 2 = 0 • 2 2

Now, on the left hand side, the <span> 2 </span> cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :
   -2x-5  = 0

Solving a Single Variable Equation :

<span> 5.2 </span>     Solve  :    -2x-5 = 0<span> 

 </span>Add  5  to both sides of the equation :<span> 
 </span>                     -2x = 5 
Multiply both sides of the equation by (-1) :  2x = -5 


Divide both sides of the equation by 2:
                     x = -5/2 = -2.500 

solution                  <span> x = -5/2 = -2.500</span>
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17. When a single set of values is randomly divided into two equal groups, explain how the means of these two groups may be very
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If you take 2 groups of equal cardinality, it could happen that, for example, many of the higher values go to the first group and therefore, many of the low values go to the second group, making their respective means quite different and different from the original sample mean. This could even go worse due to the possible existence of outliers, that is, values that are far different than the sample mean. An outlier tend to disrup the mean of a sample, but for smaller samples the result is much dramatic.

For example, let X be {1,2,3,4,5,6,7,8,9,100}

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The elements of Z sum 125, so its mean is 25

Both means are quite different from each other and quite different from the mean of X. Note that if we take the mean of the means the result is 4+25/2 = 14,5 which is equal to the mean of X.

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3 years ago
He hypotenuse of a right triangle is three times the length of one of the legs. the length of the other leg is 648‾‾‾‾√648 feet.
pantera1 [17]
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then (3x)^2 = x^2 + 648
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so x = 9 and 3x = 27

Hypotenuse is 27 feet and the leg equals 9 feet.
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3 years ago
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umka2103 [35]
I need help my self lol XD sorryyyyyyyyy88898
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Year 1
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