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Tutors Answer Your Questions about Inequalities (FREE)
Question 178656: Hi! I got a quiz back, and found a question wrong. My teacher won't explain why it's wrong and I am having trouble getting it. Here's the question:
The Mariana Trench (or Marianas Trench) is the deepest part of the world's oceans, and the deepest location on the surface of the earth's crust. It has a maximum depth of about 36,201 feet, and is located in the western North Pacific Ocean, to the east and south of the Mariana Islands, near Guam. Write an inequality that describes the height h (in feet) of all the ocean depths.
My teacher is not picky, so we don't have to write ft after everything, as long as we use the right variable and answer the right question. So my answer was the following:
0>_h>_-36201.
I used _ after the >'s to show "Greater than or Equal To" Since I don't know of a command to do that. Her answer was this:
h>-36201
If it specifies All the ocean depths, shouldn't it be greater than or equal to? She makes up her own answer keys, but insists that hers is correct. Why is her's right and mine wrong?
Click here to see answer by Mathtut(3670)   |
Question 178679: Foam fingers sold for $5. Spirit bracelets for $4. You sold 40 more foam fingers than bracelets and earned $965. Write a system of equations to describe this situation.
Solve this system using as least 2 different methods. Explain each method.
Click here to see answer by HyperBrain(694) |
Question 178601: 1. Jenny wants to utilize a portion of her garden for growing flowers. Being a designer herself, she visualizes a triangular area with different lengths for each side. For this Jenny decides to keep a side of the triangular area 3 feet shorter and the other 2 feet longer than the third side. She also wants to restrict the perimeter of the triangular area to 32 feet, so that it does not cover a huge area of the garden. Determine the maximum length of each side of the triangular area that Jenny has visualized
Click here to see answer by ankor@dixie-net.com(6691)  |
Question 179432: I tried to get some help with my homework, but the guy was wrong, because I worked it backwards, and it didn't work out.I'm 14, and have a hard time with math. Pease help me with this! 1/4(8y+4)-34<-1/3(9y-6) My two answers are y.-35, and y<-37.... neither works out.... thanx
Click here to see answer by jim_thompson5910(13787) |
Question 179487: Inequality Problem:
A cell phone company offers a contract for which the cost (C), in dollars, of telephoning time is given by C = 0.25(t - 500)+ $48.95 where it is assumed that that the time(t) is greater than or equal to 500 minutes. What times in minutes will keep cost between $95.95 and $145.45?
Click here to see answer by stanbon(26259) |
Question 179660: the charge per mile for a contract rental car at 4-d rentals is $0.12. mrs rodriguez is on a business trip and must rent a car to attend various meetings. she has a budget of 60$ per rental for mileage charges. what is the greatest number of miles mrs. Rodriguez can travel without going over her budget?
Click here to see answer by Mathtut(3670) |
Question 179823: Clark is having a party at his house. His father has allowed him to spend at most 20 dollars on snack food. He'd like to buy chips for 4 dollars a bag and pretzels that cost 2 dollars per bag.
write an inequality to describe the situation.
give two possible combinations of bags of chips and pretzels that Clark can buy.
Click here to see answer by Mathtut(3670) |
Question 179975: Free market. The equations S = 5000 + 200x and
D = 9500 - 100x express the supply S and the
demand D, respectively, for a popular compact disc brand
in terms of its price x (in dollars).
a) Graph the equations on the same coordinate system.
b) What happens to the supply as the price increases?
c) What happens to the demand as the price increases?
d) The price at which supply and demand are equal is
called the equilibrium price. What is the equilibrium
price?
Click here to see answer by stanbon(26259) |
Question 180251: The biology club budgeted $200 for their pancake breakfast. Each meal costs $1.50 to prepare. Write and inequality that represents the number of meals that can be prepared without going over the budget.
Click here to see answer by Mathtut(3670) |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330
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