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SIZIF [17.4K]
2 years ago
9

Pls help it is 7th grade math

Mathematics
1 answer:
JulsSmile [24]2 years ago
8 0

39+\dfrac 15 w \\\\=39+\dfrac 15 \left(-\dfrac 12 \right)\\\\\\=39 - \dfrac 1{10}\\\\\\=\dfrac{389}{10}\\\\\\=38\dfrac{9}{10}

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Select the correct answer. In which of the scenarios can you reverse the dependent and independent variables while keeping the i
SashulF [63]

Answer:

In Option A, we can see that the reverse may not be true as the increase in the risk for lung cancer may not necessarily mean an increase in cigarette smoked in a day. For example, high risk of lung cancer may be due to high exposure to asbestos dust too.

In Option B, again we can see that the reverse may not be true as an increase in the height of an infant does not necessarily mean that the age of the infant is increasing too. For example the infant may have a rapid gain in height even if the age is not increasing as rapidly.

In Option C, too, that an increase in the amount of pollution in a city does necessarily mean that the number of vehicles in the city has increased. For example, this increase in pollution may be due to the establishment of a high pollution causing industry in the city or in it's vicinity.

Likewise, in Option D, an increase in the density of water does not necessarily mean that the concentration of salt in the water has increased.

Only in Option E do we see a possible reverse dependence happening because an increase in the phone bill amount does usually mean an increase in the number of calls made by the cell phone.

So, in the given list of Options only in Option E can we reverse the dependent and independent variables while keeping the interpretation of the slope meaningful.

Step-by-step explanation:

3 0
2 years ago
With the table below, find F(-87)
xz_007 [3.2K]

Answer:

right

Step-by-step explanation:

5 0
3 years ago
How do i solve this?<br>13=x/4​
Alex17521 [72]

Answer:

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

                    13-(x/4)=0  

Step by step solution :

Step  1  :

           x

Simplify   —

           4

Equation at the end of step  1  :

       x

 13 -  —  = 0  

       4

Step  2  :

Rewriting the whole as an Equivalent Fraction :

2.1   Subtracting a fraction from a whole  

Rewrite the whole as a fraction using  4  as the denominator :  

          13     13 • 4

    13 =  ——  =  ——————

          1        4    

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:

13 • 4 - (x)     52 - x

————————————  =  ——————

     4             4    

Equation at the end of step  2  :

 52 - x

 ——————  = 0  

   4    

Step  3  :

When a fraction equals zero :

Now, to get rid of the denominator, Tiger multiple's both sides of the equation by the denominator. 3.1    When a fraction equals zero …

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

Here's how:

 52-x

 ———— • 4 = 0 • 4

  4  

Now, on the left hand side, the  4  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  52-x  = 0  

Solving a Single Variable Equation :  

3.2      Solve  :    -x+52 = 0  

Subtract  52  from both sides of the equation :  

                     -x = -52  

Multiply both sides of the equation by (-1) :  x = 52  

7 0
3 years ago
a recipe calls for 2 2/4 cups of raisins, but Julie only has a 1/4 cup measuring cup. How many 1/4 cups does Julie need to measu
murzikaleks [220]
OK,  So what I do first:  How many times can this number go into 1?
1/4 goes evenly into 1 4 times.  
Now how many wholes numbers are there?  2.  
2*4=8
Now how many fourths are left over?  2.
Add them to 8.
10

10 is your answer.
3 0
3 years ago
Which products are correct? A) (3.2)(2.5)(6.5) = 52B) −1.5(1.5)(1.5) = 3.375C) −5(7.2)(−3) = −108D) −(6.5)(1.4)(3.4) = −30.94E)
makkiz [27]
If you can give me more information on this I could help you a bit more respond.
5 0
2 years ago
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