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Tutors Answer Your Questions about Inequalities (FREE)
Question 156680This question is from textbook Intermediate Algebra
: "Use the Addition Property and/or Multiplication Properties to find a and b. If -3 < x < 4, then a < x + 4 < b."
I have tried substituting the "if" equation in for x in the "then" equation, but just can't seem to get anywhere. The back of the book indicates that the correct answer is a=1 and b=8. I can't figure out how to move from an inequality to an answer with an equality.This question is from textbook Intermediate Algebra
Click here to see answer by mangopeeler07(450)   |
Question 156778This question is from textbook
: Sam invested part of his $10,000 bonus in a fund that paid an 11% profit and invested the rest in stock that suffered a 4% loss. Find the amount of each investment if his overall net profit was $650.00.
I have the answer in the back of the book, I just need help setting up the formula.
Thank you.This question is from textbook
Click here to see answer by ankor@dixie-net.com(6691)  |
Question 157186: A long-distance runner can run 6 mph downhill, but her speed is cut to 2 mph when she encounters a hill. If she runs the 6 miles uphill and 6 miles downhill, what is her average speed?
If possible please show the work, i want to understand how to approach the answer. Thank you!
Click here to see answer by checkley77(7035) |
Question 157379This question is from textbook
: If student Joe has a course average score above 89, he will earn an A in the course. Suppose his scores are 79, 96, and 84 and his teacher said the final exam is worth twice the weight of the other exams. Write an inequality for the range of scores on the final exam which will result in Joe earning an A?This question is from textbook
Click here to see answer by gonzo(654) |
Question 158017: Different Weights. Professor Williamson counts his midterm as 2/3 of the grade and his final as 1/3 of the grade. Wendy scored only 48 on the midterm. What range of scores on the final exam would put Wendy’s average between 70 and 79 inclusive?
Click here to see answer by jojo14344(1483) |
Question 158087: How do i write this inequality:
Your quiz grades are 19,17,20, and 15. What is the lowest grade you can receive on the next quiz and maintain at least an 18 average?
The inequality does not have to be solved. I think the answer is 71+ x /5 >=18.
Is this correct and how do i solve inequalities like this?
Click here to see answer by checkley77(7035) |
Question 158101: Inequality word problem:
You must work for at least 80 hours in this course to complete the requirements. Some of that will be testing time, and some will be for assignments. You have 18 tests that take from 1/2 hour to 2 hours each to complete. You have 110 assignments that take between 1/2 hr and 1 hour to complete.
Write the five inequalities involved.
I'm not sure if my inequalities are correct. I think the answers are:
9<=x<=36
55<=y<=110
x+y>80
If they are correct how do i graph them?
Click here to see answer by vleith(1977) |
Question 158208: This year the high school basketball team won three more games than any team in the previous ten years. However, this was still fewer than the school record of 18 games. What was the greatest number of games won during any of the previous years. Find the inequality and solution
Click here to see answer by gonzo(654) |
Question 159128: Ziggy's famous yogurt blends regular yogurt that is 3% fat with its no fat yogart to obtain 1%fat. How many pounds of no fat yogurt should be mixed to obtain 60 pounds of low fat yogurt?
0.03x + 0.0y= 60
0.03x=60
x=60/0.03
x= 20 pounds
I am not sure if this is the way to set up the problem, please help
Click here to see answer by nerdybill(2446)  |
Question 159201: I need help on how to solve these problems.
1. 21=7x less than or equal to 7(3+x)
2. 9(w+2) < 9w +17
3. 13(r+1) < 13r-6
4. 2a-16 greater than or equal to 2a-17
5. 3t-12 > 3t+2
6. 2-3g+7 greater than or equal to 3(2-g)
Click here to see answer by oscargut(682)  |
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