What is the value of the expression 2x2+3xy-y2, when x=2 And y=-4
1 answer:
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Given :
Alice’s score is twice the difference of Aaron’s score and 5.
The sum of their scores is 320.
To Find :
Each students bowling score.
Solution :
Let , score of Aaron is x .
So , score of Alice is 2(x-5) .
Also , Their sum of scores is equal to 320 .
Therefore , score of Aaron and Alice 11 and 12 .
Hence , this is the required solution .
For this case we have the following data:
The recipe for cookies requires:
- 2 pounds of flour
- 0.75 pounds of butter
If the flour becomes the main ingredient, it will be represented by 100%.
Now, you want to know the percentage of butter, taking into account that the flour represents 100%. For this, we use a rule of three:
2 pounds of flour ------> 100%
0.75 pounds of butter ------> x
Where x represents % butter, since flour represents 100%.
So, we have:
Thus, butter represents 37.5% of the recipe.
Answer:
37.5%