Question

Jack's pet dog has been prescribed 75 mg of a medicine per day. Each pill of the medicine has 15 mg of the medicine. Jack has to give his dog a total of 25 pills. If Jack gave his dog medicine for x days, use the expression below to interpret the situation.

15 • 25 − 75x

Part A: What does 375 represent?

Part B: What does the 75x represent?

Part C: What does the entire expression represent?

Answer 1

I took this test already and got marked off for my answer. I did not agree with my Algebra teacher's explanation. I would like to see what someone else thinks the answer is and discuss your thoughts on my answer and reasoning.

Answer 2

15*25=375
\[15\rightarrow \] mg in each medicine

\[25\rightarrow \] number of total pills
\[375 \] mg in 25 pills

Answer 3

75x

75 -> allowed mg per day
x-> no of day/s

Answer 4

75x represents the amount of mg the dog has taken till now

Answer 5

375 is the total mg

Answer 6

(375-75x) represents the amount of mg left over till now

Answer 7

The issue that I had with this problem is for part C. There should be no reason to solve this as how many mg's are left. The story says that " Jack has to give is dog 25 pills" the important part HAS. So there is nothing left. I believe the information should have been worded differently. I think with this information you should only solve for x. though I agree this equation is a more difficult way to need to solve for x (days). Though There is no reason to do anything else the way it is written.

Answer 8

if nothing is left then ,the equation will be,
\[375-75x=0\]

Answer 9

u can solve for x now

Answer 10

I know but I've been informed that the correct answer is like you said before the mg's left. So My answer is wrong as per the teacher. I just don't think that it should be answered that way given the way the story reads. The story should have said something to the fact that there is 25 pills available or something not that he has to give the dog 25 pills. This is stated in the same factual way that the other info is given. So to do an equation to give us the amount of mg's left if x was random different numbers then there's do reason to believe that there is really is 15mg in each pill or that he really is giving him 75mg a day.

I'm not arguing with you, because the teacher said the same thing. I just want someone to see the same that worded the way it is in the story is incorrect.

Answer 11

does my answer matches ur teacher's answer

Answer 12

yes, it does. IT's just that I don't think it is reasonable to ask for that to be the answer given the information given in the story about Jacks dog. He says Jack has to give him 25. Not that there is 25 available an maybe not all are given. So if he gives him 25 like it says he has to. Then there is no reason to evaluate that to see how many mg would be left. None would be left it says it that way. They should rewrite the paragraph.

Answer 13

each day he can give 5 pills

Answer 14

5*15=75

Answer 15

these type of questions test the reasoning and interpretation skills along with maths