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3 years ago

What is the slope of this function?

Mathematics

1 answer:

Kryger [21]3 years ago

6 0

slope = (y2-y1)/(x1-x2)

=(20-8)/(2-1)

=12/1

m = 12

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A scientist need 10 L of a 20% acid solution for an experiment where she had only a 5% solution and a 40% solution to the neares

andrezito [222]

Answer:

Amount of 5% solution = 5.7 Litres

Amount of 40% solution = 4.3 Litres

Step-by-step explanation:

First, of all, let x be the amount of 5% solution used

Since, the scientist needs 10 L of solution, then;

Let 10 - x be the amount of 40% solution used

Now, we are told that she needs 10 L of a 20% acid solution.

This means that;

5%x + 40%(10 - x) = 20%(10).

Simplifying this gives;

0.05x + 0.40(10 - x) = 0.20 × 10

Expanding the bracket gives;

0.05x + 4 - 0.4x = 2

0.4x - 0.05x = 4 - 2

0.35x = 2

x = 2/0.35

x ≈ 5.7 litres

Thus, she will need to mix 5.7 liters of the 5% solution.

Since 10 - x be the amount of 40% solution used , then;

the amount of 40% solution = 10 - 5.7 = 4.3 litres

4 0

3 years ago

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pshichka [43]

Answer:

Step-by-step explanation:

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3 years ago

What is the value of the lower quartile?

murzikaleks [220]

Answer:

b.-4

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3 years ago

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3 years ago

The triangle angle sum property states that the measures of the 3 angles of any triangle must add to 360 degrees.

serg [7]

Answer: False

Step-by-step explanation:

Triangle is a polygon with 3 sides. The formula for calculating the sum of angle in a polygon is given as :

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where n is the number of sides , so to calculate the sum of angles in a triangle we have :

$(3-2) 180$

= 1 x 180

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3 years ago