Answer:
58.5 mg
Step-by-step explanation:
Drink: 130% of RDA of vitamin X
RDA vitamin X = 45mg
130% of 45 = mg in the drink
130% = 130/100 = 1.3
130% of 45 = 1.3*45 = 58.5
So, this new drink has 58.5 mg of vitamin
Answer:
The solutions are ![x=-4(+/-)\sqrt{13}](https://tex.z-dn.net/?f=x%3D-4%28%2B%2F-%29%5Csqrt%7B13%7D)
Step-by-step explanation:
we have
![x^{2} +8x=-3](https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2B8x%3D-3)
Complete the square. Remember to balance the equation by adding the same constants to each side
![x^{2} +8x+16=-3+16](https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2B8x%2B16%3D-3%2B16)
![x^{2} +8x+16=13](https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2B8x%2B16%3D13)
Rewrite as perfect squares
![(x+4)^{2}=13](https://tex.z-dn.net/?f=%28x%2B4%29%5E%7B2%7D%3D13)
square root both sides
![x+4=(+/-)\sqrt{13}](https://tex.z-dn.net/?f=x%2B4%3D%28%2B%2F-%29%5Csqrt%7B13%7D)
![x=-4(+/-)\sqrt{13}](https://tex.z-dn.net/?f=x%3D-4%28%2B%2F-%29%5Csqrt%7B13%7D)
Google on the word SCALAR. that's the word your looking for