Answer:
When you distribute the 7 to each set you get 14-21n and 14-21n
Step-by-step explanation:
-y = -2x + 3
y = -3x + 7
0 = -5x + 10
-10 = -5x
2 = x
y = -6 + 7
y = 1
The answer is (2,1).
Answer:
We need 4 litres of red paint.
Step-by-step explanation:
We need to take their respective precentages to compare the 3 litres of paint to 8 litres of paint.
![\frac{1.5}{3} \times 100\% = 50\% \\ \frac{1.25}{3} \times 100\% = 41.67\% \\ \frac{0.25}{3} \times 100\% = 8.33\% \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B1.5%7D%7B3%7D%20%20%5Ctimes%20100%5C%25%20%3D%2050%5C%25%20%5C%5C%20%20%5Cfrac%7B1.25%7D%7B3%7D%20%20%5Ctimes%20100%5C%25%20%3D%2041.67%5C%25%20%5C%5C%20%20%5Cfrac%7B0.25%7D%7B3%7D%20%20%5Ctimes%20100%5C%25%20%3D%208.33%5C%25%20%5C%5C%20)
Now, we know that the pale purple paint contains 50% red paint, 41.67% blue paint, and 8.33% white paint.
Now, we will transfer these percentages to the 8 litres of paint:
![50\% \: of \: 8 \: litres = 0.5(8) = 4 \: litres \\ 41.67\% \: of \: 8 \: litres = 0.4167(8) = 3.3336 \: litres \\ 8.33\% \: of \: 8 \: litres = 0.0833(8) = 0.6664 \: litres](https://tex.z-dn.net/?f=50%5C%25%20%5C%3A%20of%20%5C%3A%208%20%5C%3A%20litres%20%3D%200.5%288%29%20%3D%204%20%5C%3A%20litres%20%5C%5C%2041.67%5C%25%20%5C%3A%20of%20%5C%3A%208%20%5C%3A%20litres%20%3D%200.4167%288%29%20%3D%203.3336%20%5C%3A%20litres%20%5C%5C%208.33%5C%25%20%5C%3A%20of%20%5C%3A%208%20%5C%3A%20litres%20%3D%200.0833%288%29%20%3D%200.6664%20%5C%3A%20litres)
The answer is chemical formula.
C is the element symbol for carbon
C by itself means there is 1 atom of carbon. C is the chemical formula for 1 carbon atom.
Na is the element symbol the sodium. U can still consider it a ionic compound or sodium chloride.
I hope this helps u, I got these notes from my science teacher ms Ullman in class.