If you are referring to news* instead of "nows", the direct pattern should be used when firmness is necessary and the receiver may overlook look it. This provides for a clear explanation and understanding.
Let there be x quarts of the 20% salt solution, and (25 - x) quarts of the 80% salt solution.
Then the total amount of salt in the 20% portion would be 0.2x, while that from the 80% portion would be (0.8)(25 - x). This would have to total up to (0.44)(25) in the final solution, so the equation is:
0.2x + 0.8(25 - x) = (0.44)(25)
-0.6x + 20 = 11
x = 15 quarts of the 20% salt solution
25 - x = 10 quarts of the 80% salt solution
Answer:
5.131 × 10¹⁴ Hz
Step-by-step explanation:
<u>Planck relation</u>
where:
- E = Energy of the photon (J).
- h = Planck's constant (J · s).
- f = frequency of light produced (Hz).
Given values:
- E = 3.4 × 10⁻¹⁹ J
- h = 6.626 × 10⁻³⁴ J · s
Substitute the given values into the formula and solve for f:
If 
, then 
. You replace all x's in the function with -3.
![\begin{aligned}f(-3) &= |2(-3)+1|+5\\[0.5em]&= |-6+1|+5\\[0.5em]&= |-5|+5\endaligned}](https://tex.z-dn.net/?f=%5Cbegin%7Baligned%7Df%28-3%29%20%26%3D%20%7C2%28-3%29%2B1%7C%2B5%5C%5C%5B0.5em%5D%26%3D%20%7C-6%2B1%7C%2B5%5C%5C%5B0.5em%5D%26%3D%20%7C-5%7C%2B5%5Cendaligned%7D)
Finish by evaluating the absolute value and then adding that to the 5 that's behind the absolute value.
Can you finish it from there?
