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Anna71 [15]
2 years ago
7

You need a 15% acid solution for a certain test, but your supplier only ships 5% solution and 17.5% solution. If you need 20 lit

ers of 15% acid solution, how many liters of 5% and 17.5% solution do you need?
Mathematics
2 answers:
schepotkina [342]2 years ago
7 0

Answer:

4 liters of 5% and 16 liters of 17.5%

Step-by-step explanation:

:)

Nimfa-mama [501]2 years ago
6 0

Answer:

4 liters of 5% and 16 liters of 17.5%

Step-by-step explanation:

Let quantity of 5% be x liters and of 17.5% be y liters

x+y=20 hence y=20-x

Introducing percentages

0.05x+0.175(20-x)=0.15*20

0.05x+3.5-0.175x=3

-0.125x=-0.5

x=\frac {-0.5}{-0.125}=4

Therefore, y=20-x=20-4=16

You need 4 liters of 5% and 16 liters of 17.5% to achieve 20 liters of 15% acid solution

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70, 7*10 since it is 1/10 of that number
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3 years ago
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Riya got 10 correct answers and ten incorrect answers. what is her score if each correct answer is awarded with 3 marks and each
Natasha2012 [34]

Answer:

20

Step-by-step explanation:

Riyas score = ( correct answer × mark) + ( incorrect answer × mark lost )

= ( 3× 10) + ( -1 ×10 )

= 30 -10

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5 0
3 years ago
1. A Babylonian tablet found in 1936 shows that the Babylonians sometimes used a more accurate value of π than 3. They determine
madreJ [45]

Answer:

<h2>1/4</h2>

Step-by-step explanation:

Area of a circle is given as πr² and its circumference is expressed as 2πr.

If the babylonians determined the area of a circle by taking it as equal to the square of the circle’s circumference then;

Area of circle = (circumference of a circle)²

πr² = (2πr)²

πr² = 4π²r²

Dividing both sides of the equation by πr² we have;

\frac{\pi r^{2}  }{\pi r^{2}  } =\frac{4\pi^{2}  r^{2}  }{\pi r^{2}  }\\1 = 4\pi \\\pi =\frac{1}{4}

The value of π this yields is 1/4

6 0
3 years ago
Trent is drawing a diagram of his house for a school project. He decides that every 5 feet in real life should be 2 inches in th
salantis [7]

Answer:

5 feet (60 inches) proportional to 2 inches is a 30:1 relationship.

15 feet (180 inches) in real life should equal 6 inches on the diagram.

180 divided by 30 = 6

Step-by-step explanation:

5 0
3 years ago
7-113 b.
Jlenok [28]

An equilateral shape is a shape that has all congruent sides.

<em>Sandy has a greater probability of selecting an equilateral shape</em>

Given

Sandy: <em>Equilateral triangle, Rhombus, and Regular hexagon</em>

Robert: <em>Scalene triangle, Kite, Isosceles trapezoid, Non-special quadrilateral, and Obtuse isosceles triangle</em>

All three shapes in Sandy's shape bucket are equilateral.

So, the probability that Sandy picks an equilateral shape is 1

All five shapes in Robert's shape bucket are non-equilateral.

So, the probability that Robert picks an equilateral shape is 0

By comparing the probabilities:

<em>1 is greater than 0</em>

Hence, Sandy is more likely to pick an equilateral shape than Robert.

Read more about probabilities at:

brainly.com/question/24297863

5 0
2 years ago
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