Suppose that you are in a class of 33 students and it is assumed that approximately 15% of the population is left-handed. (give
1 answer:
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Answer:
x =
Step-by-step explanation:
Given
A = xy
Multiply both sides by 2 to clear the fraction
2A = xy ( divide both sides by y )
= x
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:
⇒