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IgorC [24]
2 years ago
6

You just found out you have to have a cavity filled! UGH! The dentist office informs you that a filling usually costs $150, but

that sometimes it can vary but that it will only vary AT MOST $20. What is the range of cost you can expect to pay for your filling?
Please help

Mathematics
1 answer:
ruslelena [56]2 years ago
5 0

Answer:

$130-$170

Step-by-step explanation:

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Answer:

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2 years ago
Heather drove a constant rate
mrs_skeptik [129]

Answer:

cool

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A chemist has one solution that has 50% acid. She has another solution that is 25% acid. How many liters of the 50% acid solutio
Tatiana [17]

Answer:

Step-by-step explanation:

Let's begin by assigning letters to represent our two unknowns:

   x (liters of 25% solution)

   y (liters of 50% solution)

 

Our system of equations will consist of two equations:

   Equation #1 (total volume of solution)

   Equation #2 (total concentration of acid)

 

Our total volume of solution is 10 liters, which can be expressed as the sum of our unknowns:

   Equation #1:  x + y = 10

 

Our total concentration of acid can be expressed as the sum of the individual acid concentrations to make up the concentration of the final solution:

   Equation #2:  (0.25)(x) + (0.50)(y) =

                            (0.40)(10)

 

We can use Equation #1 to express one unknown in terms of the other and then plug that expression into Equation #2 to solve for one of the unknowns:

   x + y = 10

         y = 10 - x

 

Now we'll plug our expression for y in terms of x into Equation #2 and solve for x:

   0.25(x) + 0.50(10 - x) = 0.40(10)

   0.25x + 5 - 0.50x = 4

   -0.25x = 4 - 5

   -0.25x = -1

          x = (-1)/(-0.25)

          x = 4 (liters of 25% solution)

 

Now we'll plug our value for x into Equation #1 and solve for y:

   4 + y = 10

         y  = 10 - 4

         y = 6 (liters of 50% solution)

 

Finally, we will verify the correctness of our answers by plugging these values into Equation #2 to see if the sum of the component acid concentrations equals the final solution concentration:

   0.25(4) + (0.50)(6) = 0.40(10)

   1 + 3 = 4

         4 = 4 (our answers are correct)

8 0
2 years ago
What is the slope of the line in the graph?
Viktor [21]

Answer:

The slope of the line in the graph is 1.

Step-by-step explanation:

Slope is determined by rise over run. Meaning that the number of units the slope goes up/down divided by the number of units the slope goes to the left/right is the slope. The rise is one, and the run is one. 1 over 1 equals 1.

4 0
3 years ago
Read 2 more answers
Which of the following is the slope of the line passing through the
julia-pushkina [17]

Answer:

I think the slope is UNDEFINED

y²-y¹/x²-x¹

(-5)-(16)/(-12)-(-12)

-21/0

=Undefined

6 0
2 years ago
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