The answer is 1 because 7*9 is 63
7*10=70 70-7=63
Using proportions, it is found that Donald should order 4 of the 0.05 gram tablets.
- This question is solved by proportions, using a <em>rule of three</em>.
- 4 tablets are needed, and they should combine for 0.2 grams. How many grams is there going to be on one tablet?
The <em>rule of three</em> is:
1 tablet - x grams
4 tablets - 0.2 grams
Applying cross multiplication:



Donald should order 4 of the 0.05 gram tablets.
For more on proportions, you can check brainly.com/question/24372153
Step-by-step explanation:
i hope this helps its kind of hard to see but i tried lol
Answer:
Step-by-step explanation:
= 9 - 7x
3 times 2 -7 x + 3
6 - 7 x + 3
3 times 7= 21 times three =63