Answer:
7
Step-by-step explanation:
I am 100% sure
<u><em>The answer is 119%.</em></u>
<u><em>1.19=119%</em></u>
<u><em>Hope this helps!</em></u>
<u><em>:)</em></u>
Answer:
-3
Step-by-step explanation:
You would find what the answer to (5•3) is then subtract that answer with 18. So it would be 15-18=-3
Answer:
x ≈ 31.9
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos15° = 
= 
( multiply both sides by 33 )
33 × cos15° = x , then
x ≈ 31.9 ( to the nearest tenth )
Let x=amount of 50% solution and y=amount of 80% solution.
x+y=600 gallons; amount of pure acid in the mixture has to be 72% of 600=432 gallons.
So 0.5x+0.8y=432; but y=600-x so 0.5x+0.8(600-x)=432, 0.5x+480-0.8x=432.
480-432=0.3x, 48=0.3x so x=160 so y=600-160=440 gallons.
160 gallons of 50% and 440 gallons of 80%.
