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Lena [83]
4 years ago
7

Anzelm wants to burn 540 calories while jogging. Jogging burns about 12 calories per minute. When Anzelm goes jogging, he usuall

y plans to stop and rest for about 5 minutes. Complete the equation below to find the total number of minutes (including rest) that Anzelm should plan to be out jogging. Use m to represent the total minutes.
Mathematics
2 answers:
Lubov Fominskaja [6]4 years ago
8 0
12(m-5)=540. 12 calories per. total minutes gos first in subtraction which is m. Minus 5 minutes.                    
                                       -Hope it helped-
kow [346]4 years ago
4 0

Anzelm wants to burn 540 calories while jogging. Jogging burns about 12 calories per minute.

he usually plans to stop and rest for about 5 minutes.

m  represents the total minutes.

12 calories per minute.

for m minutes the calories burn is 12m

He stop and rest for about 5 minutes. so we need to subtract 5 from total minutes

So expression becomes 12(m-5)

He wants to burn 540 calories. So we set the calories = 540

The equation becomes ,

12(m-5) = 540

Now we solve for m , total number of minutes

12(m-5) = 540(divide by 12 on both sides)

m - 5 = 45

m = 50 ( add 5 on both sides)

Anzelm should plan to be out jogging for 50 minutes






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<span><span> (2x3-4x2-3x-9)/(x-3)</span> </span>Final result :<span> 2x2 + 2x + 3 </span>Step by step solution :<span>Step  1  :</span><span>Equation at the end of step  1  :</span><span> <span> Step  2  :</span></span><span>Equation at the end of step  2  :</span> <span>Step  3  :</span><span> 2x3 - 4x2 - 3x - 9 Simplify —————————————————— x - 3 </span>Checking for a perfect cube :

<span> 3.1 </span>  <span> 2x3 - 4x2 - 3x - 9</span>  is not a perfect cube 

Trying to factor by pulling out :

<span> 3.2 </span>     Factoring: <span> 2x3 - 4x2 - 3x - 9</span> 

Thoughtfully split the expression at hand into groups, each group having two terms :

Group 1:  -3x - 9 
Group 2: <span> 2x3 - 4x2</span> 

Pull out from each group separately :

Group 1:   (x + 3) • (-3)
Group 2: <span>  (x - 2) • (2x2)</span>

<span>Bad news !! Factoring by pulling out fails : 

</span>The groups have no common factor and can not be added up to form a multiplication.

Polynomial Roots Calculator :

<span> 3.3 </span>   Find roots (zeroes) of :      <span> F(x) = 2x3 - 4x2 - 3x - 9</span>
Polynomial Roots Calculator is a set of methods aimed at finding values of  x  for which   F(x)=0  

Rational Roots Test is one of the above mentioned tools. It would only find Rational Roots that is numbers  x  which can be expressed as the quotient of two integers

The Rational Root Theorem states that if a polynomial zeroes for a rational number  P/Q  then  P  is a factor of the Trailing Constant and  Q  is a factor of the Leading Coefficient

In this case, the Leading Coefficient is  2  and the Trailing Constant is <span> -9. 

 </span>The factor(s) are: 

of the Leading Coefficient : <span> 1,2 
 </span>of the Trailing Constant : <span> 1 ,3 ,9 

 </span>Let us test ....

<span><span>  P  Q  P/Q  F(P/Q)   Divisor</span><span>     -1     1      -1.00      -12.00   </span><span>     -1     2      -0.50      -8.75   </span><span>     -3     1      -3.00      -90.00   </span><span>     -3     2      -1.50      -20.25   </span><span>     -9     1      -9.00     -1764.00   </span><span>     -9     2      -4.50      -258.75   </span><span>     1     1      1.00      -14.00   </span><span>     1     2      0.50      -11.25   </span><span>     3     1      3.00      0.00   <span> x - 3 </span></span><span>     3     2      1.50      -15.75   </span><span>     9     1      9.00      1098.00   </span><span>     9     2      4.50      78.75   </span></span>


The Factor Theorem states that if <span>P/Q </span>is root of a polynomial then this polynomial can be divided by <span>q*x-p </span>Note that <span>q and p originate from P/Q </span>reduced to its lowest terms 

In our case this means that 
  <span> <span>2x3 - 4x2 - 3x - 9</span> </span>
can be divided with <span> x - 3 </span>

Polynomial Long Division :

<span> 3.4 </span>   Polynomial Long Division 
Dividing : <span> <span>2x3 - 4x2 - 3x - 9</span> 
                              ("Dividend")
</span>By         :   <span> x - 3    ("Divisor")
</span>

<span><span>dividend <span> 2x3 </span>-<span> 4x2 </span>- 3x - 9 </span><span>- divisor<span> <span>* 2x2</span> </span> <span> 2x3 </span>-<span> 6x2 </span>    </span><span>remainder   <span> 2x2 </span>- 3x - 9 </span><span>- divisor<span> <span>* 2x1</span> </span>   <span> 2x2 </span>- 6x   </span><span>remainder      3x - 9 </span><span>- divisor<span> <span>* 3x0</span> </span>      3x - 9 </span><span>remainder       0</span></span>

Quotient : <span> <span>2x2+2x+3</span>  </span>Remainder: <span> 0 </span>

Trying to factor by splitting the middle term

<span> 3.5 </span>    Factoring <span> 2x2+2x+3</span> 

The first term is, <span> <span>2x2</span> </span> its coefficient is <span> 2 </span>.
The middle term is, <span> +2x </span> its coefficient is <span> 2 </span>.
The last term, "the constant", is <span> +3 </span>

Step-1 : Multiply the coefficient of the first term by the constant <span> <span> 2</span> • 3 = 6</span> 

Step-2 : Find two factors of  6  whose sum equals the coefficient of the middle term, which is  <span> 2 </span>.

<span><span>     -6   +   -1   =   -7</span><span>     -3   +   -2   =   -5</span><span>     -2   +   -3   =   -5</span><span>     -1   +   -6   =   -7</span><span>     1   +   6   =   7</span><span>     2   +   3   =   5</span><span>     3   +   2   =   5</span><span>     6   +   1   =   7</span></span>


Observation : No two such factors can be found !! 
Conclusion : Trinomial can not be factored

Canceling Out :

<span> 3.6 </span>   Cancel out <span> (x-3) </span> which appears on both sides of the fraction line.

Final result :<span> 2x2 + 2x + 3 </span><span>
</span>
4 0
4 years ago
Read 2 more answers
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