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White raven [17]
3 years ago
13

Y/7 +6=11 two step Equation

Mathematics
1 answer:
Dima020 [189]3 years ago
8 0

Answer:

                  y = 35

Step-by-step explanation:

Step  1  :

           y

Simplify   —

           7

Equation at the end of step  1  :

  y          

 (— +  6) -  11  = 0

  7          

Step  2  :

Rewriting the whole as an Equivalent Fraction :

2.1   Adding a whole to a fraction

Rewrite the whole as a fraction using  7  as the denominator :

        6     6 • 7

   6 =  —  =  —————

        1       7  

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:

y + 6 • 7     y + 42

—————————  =  ——————

    7           7  

Equation at the end of step  2  :

 (y + 42)    

 ———————— -  11  = 0

    7        

Step  3  :

Rewriting the whole as an Equivalent Fraction :

3.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  7  as the denominator :

         11     11 • 7

   11 =  ——  =  ——————

         1        7  

Adding fractions that have a common denominator :

3.2       Adding up the two equivalent fractions

(y+42) - (11 • 7)     y - 35

—————————————————  =  ——————

        7               7  

Equation at the end of step  3  :

 y - 35

 ——————  = 0

   7  

Step  4  :

When a fraction equals zero :

4.1    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:

 y-35

 ———— • 7 = 0 • 7

  7  

Now, on the left hand side, the  7  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  y-35  = 0

Solving a Single Variable Equation :

4.2      Solve  :    y-35 = 0

Add  35  to both sides of the equation :

                     y = 35

One solution was found :

                  y = 35

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Answer:

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Step-by-step explanation:

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At the given point, these are ...

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b) The partial derivatives of f(x, y, z) = x² -2xy +3xyz² are ...

  • fx = 2x -2y +3yz²
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  • fz = 3xy

At the given point, these are ...

  • fx(3, 1, -2) = 2(3) -2(1) +3(1)(-2)² = 16
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Iteru [2.4K]

The class spends $1436.4 per year on pizza. Since the population grows x² in one year, the strength of the class on the last day of the year is 12² = 144.

<h3>How to find the total population of the class in one year?</h3>

It is given that,

The current population of the classroom is 12. I.e., x = 12

So, at the end of the year, the population of the class = x²

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Thus, the population of the classroom on the end day of the year is 144.

<h3>How many slices of pizza are required for this population in the class?</h3>

It is given that,

On the last day of the year, each person in the classroom eats 3 slices of pizza.

So, 144 persons eat,

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Thus, 432 slices of pizza are required for the given population.

<h3>How much money does a class spend per year on pizza?</h3>

It is given that,

A single pizza has 8 slices and every single pizza costs $26.60.

Since there are 432 slices, then the number of pizzas

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Then, the cost of 54 pizza's = 54 × $26.60 = $1436.4

Therefore, $1436.4 was spent on pizza per year.

Refer to more such problems here:

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