Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 143886: Hello all Yes I am back in an algebra class and I need some serious help again. I would so much appreciate your help in helping me pass this class!! I am not good at all in algebra, but am doing the ones that I can and will some help with the ones I need help with. I want to thank you all in advance for your help. Thanks!!
Solve.
4y + 5y <_ -81
The solution is {yly ? ?}
Click here to see answer by stanbon(75887)  |
Question 143952: A designer, attempting to arrange the characters of his artwork in the form of a square grid with equal number of rows and columns, found that 24 characters were left out. When he tried to add one more row and column, he found that he was short of 25 characters. Can you find the number of characters used by the designer?
Click here to see answer by stanbon(75887) |
Question 143952: A designer, attempting to arrange the characters of his artwork in the form of a square grid with equal number of rows and columns, found that 24 characters were left out. When he tried to add one more row and column, he found that he was short of 25 characters. Can you find the number of characters used by the designer?
Click here to see answer by vleith(2983) |
Question 143894: In 1991, the life expectancy of males in a certain country was 68.5 years. In 1996 it was 71.1 years. Let E represent life expectancy in year t and let t represent the number of years since 1991.
The linear function E(t) that fits the data is
E(t)=?t + ?
Use the function to predict the life expectancy of males in 2009?
E(18)=?
Can someone help me with this one I do not understand. I dont understand the year t and let t represent the number of years. Doesnt t already represent a certain year, then it says it is the number of years since 1991? HELP!!!
Click here to see answer by oscargut(2103)  |
Question 144050: Miguel's insurance company will replace his car if repair cost 80% of the cars value. The recently sustained $8000 worth of damage, but it was not replaced. What was the value of the car?
I might have a few more questions tomorrow, but i think I can do the next couple by myself...maybe. Thanks for all your help
Click here to see answer by stanbon(75887) |
Question 142655: In 1991 the life expentancy of males were in a certain country was 68.5 years.
In 1996 it was 71.1 years. Let E represent the lif expenctancy in year t, and let t represent the number of years since 1991.
The linear function E(t)that fits the data is
E(t)=?t + ??
Use the function to predict the life expendancy of males in 2009.
E(18)=
Can someone please help me with this I have no idea where to even start. I dont understand these at all, will someone explain to me or at least try to help me??
Click here to see answer by marcsam823(57) |
Question 144121: A square piece of cardboard is to be formed into a pizza box. The box is formed by cutting 2-inch square corners from the cardboard and folding them up. If the volume of the box is 512 in^3, what are the dimensions of the cardboard?
Click here to see answer by solver91311(24713)  |
Question 144139: Solve then graph.
x + 6 < -3 or x + 6 > 1
The solution is {xlx ?}
Do -9 and -5 go in the question mark places above in that order? -9 in the first box and -5 in the second?(I cant make boxes either so I used question marks) And would the graph Have a ] or AN ) at the -9 spot with the arrow going to the left towards the higher -numbers? And a [ or an ( at the -5 spot? I hope i am making sense to you all. Can someone please help?
Click here to see answer by stanbon(75887) |
Question 144139: Solve then graph.
x + 6 < -3 or x + 6 > 1
The solution is {xlx ?}
Do -9 and -5 go in the question mark places above in that order? -9 in the first box and -5 in the second?(I cant make boxes either so I used question marks) And would the graph Have a ] or AN ) at the -9 spot with the arrow going to the left towards the higher -numbers? And a [ or an ( at the -5 spot? I hope i am making sense to you all. Can someone please help?
Click here to see answer by jim_thompson5910(35256) |
Question 144142: OOPPPSS! I no i said the last one was my last one but I cam across another one that I do not understand how to do correctly. Can you please help it is a word problem?
A cellular phone company offers a contract for which the cost C, in dollars, of t minutes of telephoning is given by C=0.25(t-400) + 44.95 where it is assumed that t>_400 minutes. What times will keep cost between $91.20 and $114.70.
HELP PLEASE!!!
Click here to see answer by jim_thompson5910(35256) |
Question 144135: This is another word problem that I just do NOT have Any idea how to do, will someone please help me with this?
5. When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of $5,000. Refer to the table below and answer the questions that follow. Round your answers to the nearest tenth of a percent.
Category Cost Percentage
Labor $1,835 ???
Materials ??? 18%
Rent/utilities ??? 25%
Miscellaneous $1,015 ???
Total $5,000 100%
a) What percentage of the total monthly budget is spent on labor?
b) What percentage of the total monthly budget is spent on miscellaneous items?
c) How much do materials cost monthly?
d) How much do rent and utilities cost monthly?
HELP PLEASE!!!
Click here to see answer by solver91311(24713) |
Question 144135: This is another word problem that I just do NOT have Any idea how to do, will someone please help me with this?
5. When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of $5,000. Refer to the table below and answer the questions that follow. Round your answers to the nearest tenth of a percent.
Category Cost Percentage
Labor $1,835 ???
Materials ??? 18%
Rent/utilities ??? 25%
Miscellaneous $1,015 ???
Total $5,000 100%
a) What percentage of the total monthly budget is spent on labor?
b) What percentage of the total monthly budget is spent on miscellaneous items?
c) How much do materials cost monthly?
d) How much do rent and utilities cost monthly?
HELP PLEASE!!!
Click here to see answer by checkley77(12844) |
Question 144047: Snookers Lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as it does lumber. It makes a profit of $25 on a unit of lumber $40 on a unit of plywood. How many of each unit must be sold in order to make a profit of $10710?
Snookers must produce and sell ? units of Lumber and ? units of Plywood to make a profit of $10710?
I cannot do most word puzzles, I did three earlier and now need some help with this one and I think another one too, can you help please?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 144184: Please help!! The problem is 4m^2 +25=20m.
This is what I have.. 4m^2- 20m+ 25=0. I used the formula b^2 - 4ac and the answer is 400-400=0. The discriminant is zero so there is only one answer. But I can't figure out the #.. Any help is greatly appreciated!!! Thanks.
Click here to see answer by jim_thompson5910(35256) |
Question 144268: The formula of d=0.044s(squared)+1.1s related to maximum speed s in miles per hour that you should travel in order to be able to stop in d feet. Suppose you have 80ft (about 10 car lengths) between your car and the car in front of you. Find the maximum speed you should travel. Does this seem reasonable to you. Explain.
Click here to see answer by vleith(2983) |
Question 144284: x^2 -3x = -6x -1
Can somebody explain how to do these? I have a whole paper of them to solve and don't know where to start!
Get all the terms on the left, and 0 on the right side.
 Add and subtract to make the right side 0.
Then use the quadratic equation to solve.
a = 1, b = 3, c = 1
This gives  , and 
Click here to see answer by Alan3354(69443)  |
Question 144322: his is another WORD PROBLEM that i do not understand how to do, can someone please help?
2. You are trying to decide how to most efficiently use your oven. You do not want the oven running at a high temperature when it is not baking, but you also do not want to waste a lot of time waiting for the oven to reach the desired baking temperature.
The instruction manual on the industrial oven suggests your oven temperature will increase by 45 degrees Fahrenheit per minute. When the over is initially turned on, the temperature is 70 degrees Fahrenheit. What will the temperature of the oven be after 7 minutes? Write an expression and explain how you arrived at your answer.
Click here to see answer by vleith(2983) |
Question 144322: his is another WORD PROBLEM that i do not understand how to do, can someone please help?
2. You are trying to decide how to most efficiently use your oven. You do not want the oven running at a high temperature when it is not baking, but you also do not want to waste a lot of time waiting for the oven to reach the desired baking temperature.
The instruction manual on the industrial oven suggests your oven temperature will increase by 45 degrees Fahrenheit per minute. When the over is initially turned on, the temperature is 70 degrees Fahrenheit. What will the temperature of the oven be after 7 minutes? Write an expression and explain how you arrived at your answer.
Click here to see answer by stanbon(75887) |
Question 144321: Will some one please help me with this word problem, I answered a) but am not even sure if i have that right, wil someone help me please!
1. You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an $80,000 loan from your family and a $38,250 small business loan. These loans must be repaid in full within 10 years.
a) What integer would represent your total budget? $118,250
b) Twenty-five percent of your budget will be used to rent business space and pay for utilities. Write an algebraic expression that indicates how much money will be spent on business space and utilities. Do not solve.
c) How much money will rent and utilities cost? Explain how you arrived at this answer.
d) Suppose an investor has increased your budget by $22,250. The investor does not need to be repaid. Rather, he becomes part owner of your business.
Will the investor contribute enough money to meet the cost of rent and utilities? Support your answer, and write an equation or inequality that illustrates your answer.
e) This equation illustrates your remaining funds after paying for rent and utilities. How much money is left? Explain how you arrived at your answer.
$38,250 + $80,000+ $22,250-0.25($80,000 + $38,250) =
¬
Click here to see answer by vleith(2983) |
Question 144323: The Perimeter of a Rectangle 108m The length is 3m more than twice the width. Find the dimensions. What is the length and the width? (simplify)?
Will someone please help me with this word problem. I cannot do these for the life of me. help
The perimeter is 2L + 2W, so the Length + the Width is 54, 1/2 of 108.
It says, L = 2W+3, and
L+W=54.
2 equations in 2 unknowns:
L+W=54 eqn (1)
L=2W+3 eqn (2)
Substitute for L in eqn (1)
W+2W+3=54
3W + 3 = 54
3W = 51
W = 17
L = 37
Click here to see answer by Alan3354(69443) |
Question 144385: I have one word problem left and need some help.
Soybean meal is 16% protein; cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320-lb mixture that is 9% protein? How many ponds of the cornmeal should be in the mixture? How many pounds of the soybean meal should be in the mixture?
Click here to see answer by vleith(2983) |
Question 144440: Someone, please show me how to find the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex. The only thing i need to do is find the number and types of solutions.
(3)1/2y2 - 4y - 7(3)1/2 = 0. i would appreciate any help i can get. Thank you in aadvance.
Click here to see answer by Alan3354(69443) |
Question 144442: On this problem, just like the other, i don't understand how you can have the solution equal to zero. It says that i need to use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex. How do i determine the number and types of solutions. For this equations 2x2 - 10x + 25 = 0. Please help me someone.
Click here to see answer by stanbon(75887) |
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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, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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