At mario Italian restaurant 118 of the 200 plates are dirty. What percent of the plates are clean
1 answer:
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Answer:
Part A:
Part B:
and
Step-by-step explanation:
Part A:
The inicial concentration of the lemonade is 50%, and the volume is 4 quarts, and we will add x quarts of a lemonade with a concentration of 100%, so the total volume will be y, and the concentration will be 0.7, so we have that:
Using the value of y from the first equation in the second one, we have:
Part B:
If he shoots a total of ten targets, we can write the equation:
Each stationary target is 2 points, and each moving target is 3 points, so if the total points is 23, we have:
If we subtract the second equation by two times the first one, we have:
⇒
Answer:
-2x + 5
Step-by-step explanation:
When you set this problem up:
It's easy to see that you can't really divide them due to their differing variables. So, we need to factor the numerator to give us equivalent variables:
WAIT! Look at the longer factor:
It is equivalent to our denominator! Now, that has made the job incredibly easier. Simply cancel out the like terms in the problem and we have our answer:
(-2x + 5)