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2 years ago

In the lab, Teresa has two solutions that contain alcohol and is mixing them with each other. She uses 4 times as much

Mathematics

2 answers:

Mila [183]2 years ago

8 0

Answer:

Step-by-step explanation:

Assume as a basis the final mixture is 1000 mL. That means 399 mL of alcohol

Let x = mL of Soln A and y = mL of soln B.

x = 2y.

Now x + y = 1000

and 0.2x + 0.17y = 399

but x = 2y so 0.4y + 0.17y = 399

0.57y = 399.

y = 700 mL (That is your mL of solution B)

Klio2033 [76]2 years ago

3 0

The Answer is 4,666.66667 just to let u know I’m not considered with the answer

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Simplify 7x + 2y - 3x + 4y Factorise 10x - 15 Solve 5p = 3p + 8

vlada-n [284]

Answer:

1. x = -1.5y

2. 5 (2x-3)

3. p = 4

Step-by-step explanation:

1) Simplifying

7x + 2y + -3x + 4y = 0

Reorder the terms:

7x + -3x + 2y + 4y = 0

Combine like terms: 7x + -3x = 4x

4x + 2y + 4y = 0

Combine like terms: 2y + 4y = 6y

4x + 6y = 0

Solving

4x + 6y = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-6y' to each side of the equation.

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Combine like terms: 6y + -6y = 0

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4x = 0 + -6y

Remove the zero:

4x = -6y

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x = -1.5y

Common factor

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5 (2x-3)

3) Simplifying

5p = 3p + 8

Reorder the terms:

5p = 8 + 3p

Solving

5p = 8 + 3p

Solving for variable 'p'.

Move all terms containing p to the left, all other terms to the right.

Add '-3p' to each side of the equation.

5p + -3p = 8 + 3p + -3p

Combine like terms: 5p + -3p = 2p

2p = 8 + 3p + -3p

Combine like terms: 3p + -3p = 0

2p = 8 + 0

2p = 8

Divide each side by '2'.

p = 4

Simplifying

p = 4

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Answer:

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