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Shkiper50 [21]
3 years ago
11

You need a 25% alcohol solution. On hand, you have a 45 mL of a 15% alcohol mixture. You also have 30% alcohol mixture. How much

of the 30% mixture will you need to add to obtain the desired solution?
Mathematics
1 answer:
pogonyaev3 years ago
3 0

A 75% alcohol concentration mixture of water and alcohol and was made by mixing 30 ml of pure alcohol with 150 ml of original mixture

Maths
How much pure alcohol has to be added to 400ml of a solution containing 15% alcohol to 

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Emanuel added two integers.
Temka [501]
A. When you add to negative numbers, it is always negative. A positive + a positive is positive. In D, the answer is always 0. 1 + -1 is 0. In C, it varies. The bigger number not including the negative sign is the sign the number has. For example, -6 + 5 = -1. 6 is bigger than 5. You subtract the smaller number from the bigger number and that is the answer. You would then tack on the negative sign because it is -6, and 6 is bigger than 5.
7 0
2 years ago
Please tell me the steps to this problem. i will give brainliest
gayaneshka [121]

Option C: -3 is the average rate of change between x=-1 and x=1

Explanation:

The formula to determine the average rate of change is given by

Average rate of change = \frac{y_2-y_1}{x_2-x_1}

We need to find the average rate of change between x=-1 and x=1

Thus, from the table, we have,

x_1=-1 , y_1=5

x_2=1 , y_2=-1

Thus, substituting these values in the formula, we get,

Average rate of change = \frac{-1-5}{1+1}

                                        =\frac{-6}{2}

                                        =-3

Thus, the average rate of change between x=-1 and x=1 is -3.

Hence, Option C is the correct answer.

6 0
2 years ago
Which of the following statements is true for the quadratic equation x2 – 16x + 64 = 0?
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Answer:

Please provide the statements.

Step-by-step explanation:

6 0
2 years ago
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How do you solve k/2+9=30
Mrrafil [7]
If you would like to solve the equation k / 2 + 9 = 30, you can calculate this using the following steps:

k / 2 + 9 = 30
k / 2 = 30 - 9 
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k = 21 * 2
k = 42

The result is 42.
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likoan [24]

Hey there!

  • 4 ways to name angles

⇒ Use the vertex as the middle letter, and the point from each side (<ABC or <CBA)

⇒ Use the vertex only (<B)

⇒ Use a number (<1)

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⇒ Acute angle: less than 90°

⇒ Right angle: exactly 90°

⇒ Obtuse angle: between 90° and 180°

⇒ Straight angle: exactly 180°

Thank you,

Eddie

See the attachment for a visual!

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