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Leokris [45]
3 years ago
7

If m 2 n, which inequalities must be true? Check all that apply.

Mathematics
2 answers:
anzhelika [568]3 years ago
8 0

Answer:

(a)\ m+ 2.1 > n + 2.1

(b).\ m - (-4) > n - (-4)

(c)\ 9 +m> 6 + n

Step-by-step explanation:

Given

m > n

Required

Select true inequalities

(a)\ m+ 2.1 > n + 2.1

Subtract 2.1 from both sides

m > n

This is true

(b).\ m - (-4) > n - (-4)

Open brackets

m + 4 > n + 4

Subtract 4 from both sides

m > n

(c)\ 9 +m> 6 + n

m> -9+6 + n

m> n-3

This is also true

shutvik [7]3 years ago
4 0

Answer:

A,B,D

Step-by-step explanation:

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The smallest side of a 30-60-90
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4 0
3 years ago
4/w - 10 = 5<br>this is 8th grade<br>​
vovikov84 [41]

Answer:

4/w-10=5

One solution was found :

                  w = 4/15 = 0.267

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    4/w-10-(5)=0

Step by step solution :

Step  1  :

           4

Simplify   —

           w

Equation at the end of step  1  :

  4          

 (— -  10) -  5  = 0

  w          

Step  2  :

Rewriting the whole as an Equivalent Fraction :

2.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  w  as the denominator :

         10     10 • w

   10 =  ——  =  ——————

         1        w  

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2       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:

4 - (10 • w)     4 - 10w

————————————  =  ———————

     w              w  

Equation at the end of step  2  :

 (4 - 10w)    

 ————————— -  5  = 0

     w        

Step  3  :

Rewriting the whole as an Equivalent Fraction :

3.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  w  as the denominator :

        5     5 • w

   5 =  —  =  —————

        1       w  

Step  4  :

Pulling out like terms :

4.1     Pull out like factors :

  4 - 10w  =   -2 • (5w - 2)

Adding fractions that have a common denominator :

4.2       Adding up the two equivalent fractions

-2 • (5w-2) - (5 • w)     4 - 15w

—————————————————————  =  ———————

          w                  w  

Equation at the end of step  4  :

 4 - 15w

 ———————  = 0

    w  

Step  5  :

When a fraction equals zero :

5.1    When a fraction equals zero ...

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

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

 4-15w

 ————— • w = 0 • w

   w  

Now, on the left hand side, the  w  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  4-15w  = 0

Solving a Single Variable Equation :

5.2      Solve  :    -15w+4 = 0

Subtract  4  from both sides of the equation :

                     -15w = -4

Multiply both sides of the equation by (-1) :  15w = 4

Divide both sides of the equation by 15:

                    w = 4/15 = 0.267

One solution was found :

                  w = 4/15 = 0.267

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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