Answer:
John should use:
4 grams of the 30% solution and 16 grams of the 60% solution
Step-by-step explanation:
Let the number of grams of the 30% solution = x
Let the number of grams of the 60% solution = y
John needs 20 grams of 54% acid solution for his science project.
Hence,
x + y = 20 grams..... Equation 1
x = 20 - y
His school's science lab has bottles of 30% solution and bottles of 60% solution.
30% × x + 60% × y = 54% × 20
0.3x + 0.6y = 10.8......Equation 2
We substitute 20 - y for x in Equation 2
0.3(20 - y) + 0.6y = 10.8
6 - 0.3y + 0.6y = 10.8
- 0.3y + 0.6y = 10.8 - 6
0.3y = 4.8
y = 4.8/3
y = 16 grams
x = 20 - y
x = 20 - 16
x = 4 grams
Therefore, John should use:
4 grams of the 30% solution and 16 grams of the 60% solution
I believe that he answer would be <span>0.35</span>
Answer:
25%
Step-by-step explanation:
14/56 * 100/100
= (14 × 100/56) * 1/100
= 25/100
= 25%
This is actually a riddle or a question based on a puzzle. The answer for this given riddle is that HE JUST KEPT GOING OVER IT (21 Letters). Coach Trex teach Tonka to high jump by just keep going over it. Hope this is the answer you are looking for.
I'm stuck on that one too
