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vesna_86 [32]
3 years ago
10

Who’s some good nice people that want personal help with math

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
8 0

Answer:

Share!

Step-by-step explanation:

Well, if you share Brainly with others, they might want help and you can help your friends and family!


And, you can also become friends with somebody and then help them.


Hope this gives you some ideas!

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Pls help
Nimfa-mama [501]
The answer would be a reflection over the x axis then a translation down 4 units. Yes the shapes are congruent as they will lay on top of one another
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Number 18 idk what to do help plz and fast
stepan [7]
It is right it is C 454.5
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3 years ago
Three times a number is equal to 12 less than the number. Find the number.​
Juliette [100K]
Well (three times four is equal to twelve. So the answer should be 4
5 0
3 years ago
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
How many solutions does the following system of equations have? y=5/2x+2 and 2y=5x+8
Harman [31]
None they are parallel lines - same slope different y intercept
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3 years ago
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