MATHEMATICS HIGH SCHOOL

A chemist has 20 gallons of solution with 12% saline. How much pure saline (100% saline) needs to be added to the 20 gallons to create a mixture with 15% saline content? Round your answer to the nearest tenth (if you answer this please let me know how you got the answer, thank you!)

Answers

Answer 1

Answer:

Answer:

0.6 gallons of pure saline

Step-by-step explanation:

15-12=3

3=×0.03

20 gallons ×0.03=0.6 gallons

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Answers

Answer:6x^2 -9x

Step-by-step explanation:

6x2-9x would be the correct answer

The square root of 80 p to the 3rd

Answers

√(80 p³ = √ (16 x 5 x p² x p)

You know the square roots of 16 and p , so you can take them out of the radical.

= (4p) x √(5p)

I added pictures, but I don't know how they'll come out when I post this. Sorry if it ends up looking weird :/
You should start by factoring the number inside the cube root/radical sign, which in this case is 80. If you remember how to do factor trees, just do that with the number 80. The p is already prime, so you don't need to worry about it at first. (see picture 1)
Now see if there are any triplets of prime numbers. In this case, there is a triplet of twos (see picture 2), so you bring down one 2 to your answer (see picture 3). If there had been two triplets, you would have brought both numbers down and multiplied them.
There should be three prime numbers left: 2, 5, and p. (see picture 4) Go back down to your answer, put a cube root/radical sign next to the 2, and put your prime numbers in the cube root/radical. You should have 2∛2·5p. 2·5 can be simplified to 10, so your final answer will be 2∛10p (see picture 5).

Please help thanks.

.___________.

Answers

Answer:

I am very positive that the answer is A.

Step-by-step explanation:

I believe it is A, because if you look at each of the input numbers there, they are 12, which divided by 2 is 6. 18, which divided by 2 is 9. 20, which divided by 2 is 10. 22, which divided by 2 is 11. This problem is a division problem.

The answer is a

Explanation: the input divided by two is the output

Evaluate 4d + 9e – 14 for d =7 and e = 3.
The value of the expression is
Plzzz help