Answer:
9 cows and 15 ducks
Explanation:
step 1: create a system of equations, using the variable c for cows and d for ducks.
step 2: solve for d in the first equation, then plug it into the second, so that we can solve for c.
step 3: solve for c
step 4: now that we know what c is, plug c back into the first equation, and solve for d
step 5: solve for d, which gives you 15 ducks. We found c in step 3, which is 9 cows.
Answer:
quarter is like test and semester is like exam
The conclusion that the writer should add to summarize the argument of the passage is: "Hence, more schools should follow the trend of starting later in the morning if they want to see improved test scores, greater attendance numbers, and, most importantly, healthier, happier teens."
<h3>Meaning of a text's conclusion</h3>
The conclusion of a text is the final part of the text where the author summarizes the main ideas of the text.
The text above encourages the opening of schools later to help students enjoy longer hours of sleep. The conclusion beginning with the transition, "hence" aptly summarizes this point.
Learn more about conclusions here:
brainly.com/question/12809344
D. Ledger lines are used to extend musical staff. I think my answer is correct because ledger lines represent notes that surpass the bottom and up limits.