2(10r-7)-2(1+10r)=-r+2r
1 answer:
Answer:
r = -16
Step-by-step explanation:
We will use "distributive" property and "adding like terms" concepts in solving for the unknown variable "r".
The distributive property is:
a(b+c) = ab + ac
So
2(10r-7) = 20r - 14
also
-2(1+10r) = -2 - 20r
So, our equation becomes:
Now we add like terms and move variables (r) to one side and numbers to another. Like terms mean:
3r + 5r = (3+5)r = 8r
So, we have:
So,
the value of r is -16
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The result of experiment in mixed fraction form is particles per milliliter.
To convert decimal to fraction, we the decimal number over 1 and multiply both the numerator and denominator by power of 10.
Given the data in the question;
- Result of experiment in decimal form = 117.755
- Result of experiment in mixed fraction form = ?
In 117.755, we have 3 numbers to the right of the decimal point.
We have 10³ which is the same as 1000.
Next, we divide both the numerator and the denominator with their Greatest Common Factor.
Greatest Common Factor of 117755 and 1000 is 5
Now, we can get 200 out of 23551 exactly 117 times, since what remained is not divisible by 200, we leave it as a remainder [151].
We can now write this in a mixed fraction form as;
Therefore, the result of experiment in mixed fraction form is particles per milliliter.
Learn more about fractions here: brainly.com/question/10354322
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