ASA Al Nur Algebra II Class!
Lets work on our word problem skills!
Keith has $500 in a savings account at the beginning of the summer. He wants to have at least $200 in the account by the end of the summer. He withdraws $25 each week for food, clothes and movie tickets. Write an inequality that represents Keith's situation. How many weeks can Keith withdraw money from his account? Should you use an inequality or an equal sign? Why? Justify your answer.
Remember, discussions are written in paragraph form (at least 4 sentences).
Due: Tuesday, December 4, 2012 @ midnight!
My inequality would be 200+25x<500. Keith can withdraw money from his savings account for 8 weeks. I think you should use an inequality. The reason is bc of the words at least 200 dollars. That lets me know that we have to use inequality. We should use it bc it lets us know that he wants to have at least 200 dollars, meaning no less than 200 dollars.
ReplyDeleteYou should use an inequality for this problem because the key words "at least", meaning greater than or equal to, are being used. My inequality to solve for the solution would be 500-25x is greater than or equal to 200. The solution would that x is less than or equal to 12. So, Keith can withdraw money from his account for 12 weeks or less.
ReplyDeleteMy inequality is 500-25x is greater than or equal to 200. After you solve the inequality you should get that x is less than or equal to 12. Reason being is because the sign will flip directions because I divided by a negative number. Therefore he can withdraw money 12 times or any number less than 12.
ReplyDeleteI think you should also use an inequality symbol because you can see that key word "at least" which is similar to the other symbols, my inequality was 500-25x is greater than or equal to 200 because if x is less than or equal to 12, Kieth would beable to withdraw his money from his own account for 12 wks.
ReplyDeleteInequality: 500-25(x) is greater than or equal to 200; I choose that inequality because, he is taking out 25 dollars from that $500 every week and I put the variable in parenthesis to be multiplied by 25, to be able to enter how long he was doing it or how many times a week he took $25 out. Keith would be able to withdraw money from his savings account for 12 weeks. I think we should use and inequality because if you plug in 12 into the equation for x it equals to 300 and of course 300 doesn't equal to 500 but, if you use an inequality you are saying that whatever he spends can be greater than or equal to 200 so, it satisfies both.
ReplyDeleteI would use the inequality bc it says he wants to have at least 200 dollars in his account not that he will have 200 dollars in his account. So first you do 500-25x is equal to or less than 200. then u subtract 200 from both sides and youll get 300 and divide that by 25x and the answer is 12. In order for Keith to have atleast 200 dollars in his account he will have to withdraw 25 dollars in 12 weeks
ReplyDeletethe inequality is 500-25(x) is greater than or equal to 200. you should use in a inequality because it does a comparison on how much more or less the values are. it also tells your if their equal to each other.
ReplyDeleteI would use the inequality because it will be equal to 200 or greater than 200. I would write my inequality as 500-25x because x is the unknown.This will allow him to take money out of his account without spending more than he intended.
ReplyDeleteInequalities are necessary for this problem. If you have a $500 account, than you must use a variable to see how many times can you take before you get 200. And because there is no set number, an inequality is necessary
ReplyDelete