Answer:
6
Step-by-step explanation:
|-6| = 6
|6| = 6
- -6 = +6
so, we have
6 - 6 + 6 = 6
Answer:
2.33 units
Step-by-step explanation:
![\tan 25\degree =\frac{AC}{5}\\\\0.46630 = \frac{AC}{5}\\\\AC = 0.46630 \times 5\\AC =2.3315\\AC = 2.33 \: units](https://tex.z-dn.net/?f=%5Ctan%2025%5Cdegree%20%3D%5Cfrac%7BAC%7D%7B5%7D%5C%5C%5C%5C0.46630%20%3D%20%5Cfrac%7BAC%7D%7B5%7D%5C%5C%5C%5CAC%20%3D%200.46630%20%5Ctimes%205%5C%5CAC%20%3D2.3315%5C%5CAC%20%3D%202.33%20%5C%3A%20units)
Let x be the number of mm of pure alcohol to be added:
I will add the mm to express the volume in mm
100mm.(19%) + (100%).x mL = (100 mL+x mL).(40%).
Now right again without the %
100.(0.19) + x.(1) = (100+x).(0.4)
19 + x = = 40 + 04x
x - 0.4x = 40 - 19
0.6 x = 21
x = 21/0.6 and x = 35 mL. This te quantity of pure alcohol should to be added to get a solution at 40%.
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Answer:
last one "kiki" is true...