Answer:
The first opinion
Step-by-step explanation:
Answer:
<u>⚪</u><u> </u><u>(</u><u>4</u><u> </u><u>•</u><u> </u><u>3</u><u>)</u><u> </u><u>+</u><u> </u><u>(</u><u>4</u><u> </u><u>•</u><u> </u><u>8</u><u>)</u>
Step-by-step explanation:

by distributing 4 in the bracket:

Answer:
20 days
Step-by-step explanation:
899- 225= 674
674÷ 35= 19.257....
which you would round it up to 20 because he would have to work the extra day because you need more than less.
They must sell, 30 cups of lemonade. How I got my answer.
Since it cost $1.20 to start, and a cup of lemonade cost $0.6 to make and there selling them at $0.10 each. So we know they are making a $0.4 profit off of each cup of lemonade. We now have to multiply 4×30=120.
I hope this helps!
Answer:
Eric's expression is :

and Andrea's is :

In Eric's expression, 20 represents the initial amount of substance with which he has started the experiment.
is the amount of substance left after each time period (in this case, each week).The variable w in this case represents the number of weeks.
Andrea's expression can be written as :

The one outside of parentheses represents the initial amount of the substance. The one inside of parentheses represents 100% of the original amount of the substance. 0.5 represents the 50% of the substance that is lost each time period. The variable w in this case represents the number of weeks.