Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 1044836: A long distance telephone company advertised the rates of 5 minutes for 85¢ and 10 minutes for $1.10.
Choose the ordered pairs that you would use to find the linear equation.
(5,0.85)and(10,1.10)
(5,10)and(0.85,1.10)
(5,1.10)and(10,0.85)
Click here to see answer by advanced_Learner(501)   |
Question 1044835: A long distance telephone company advertised the rates of 5 minutes for 85¢ and 10 minutes for $1.10.
Choose the ordered pairs that you would use to find the linear equation.
(5,0.85)and(10,1.10)
(5,10)and(0.85,1.10)
(5,1.10)and(10,0.85)
Click here to see answer by Boreal(15235)  |
Question 1044895: Question: It costs $0.30 for Tina to produce a glass of lemonade. If she charges p dollars for one glass, she believes she can sell 50 - p glasses of lemonade in a day. Find a quadratic function that gives Tina's daily profit as a function of price. Then graph Tina's profit as a function of price.
Answer: This is as far as I got - any help appreciated.
I thought if X = glasses sold then X = (50-p). And Profit would be the price of one glass (p) - 0.30, then Total Profit would be = (50-p)(p-0.30). I then tried to use algebra to simplify this, and think I came unstuck. I used the FOIL method (first, outer, inner, last). So F (50 * p) = 50P. O (50*-0.30) = - 15. I (-p * p) = -p^2. L (-p*-0.30) = 3P/10. So the final equation would be -p^2 + 50p - 3P/10 - 15. I then got lost as to how to simplify 50p - 3p/10. Thanks in advance.
Click here to see answer by josgarithmetic(39613) |
Question 1045341: This homework should be viewed as an individual effort but if needed ask your IA for help. Earth scientists make graphs of data to analyze natural processes. The most common plot is the x-y graph (the horizontal axis is for x values, vertical axis for y values). In class lectures we will usually examine graphs that have time on the xaxis, and some other value on the y-axis. This is called a time series. We use time series to see how some variables change over long or short time intervals. Since we will be using graphs a lot in our lecture we should become familiar with them. Here, for example, we will plot the rabbit population of a hypothetical rabbit colony as a function of time. Assume the rabbits are in a closed, protected area and there are no rabbit predators. Assume the rabbits are free to reproduce, the rabbits live for 6 years, each pair of rabbits produces 5 male and 5 female bunnies each year. Start with 4 pairs of rabbits; so on year 0 we have 4 pairs or 8 rabbits. On year 1 we have (4x10)+8 rabbits. On year 2 we have (24x10)+48 rabbits and so on……. This is an example of exponential growth. Keep in mind that worldwide the human population is described as growing exponentially.
1. How many rabbits are there on year 4 (write answer here)?_________________________ (2 points) Show your work on the back of this page, no work no credit here or below. hello I'm trying to find Exponential Growth in a rabbit could your tell me if I'm doing this correct. I'm already given year one and two but I have to find 3 and 4.
(4x10)+8
(24x10)+48
(144x10)+288
(864x10)1728 and I have to do this all the way to 6 and then I have to plot it on the hw sheet. Help Please
Click here to see answer by ikleyn(52751)  |
Question 1045366: I was wondering if you can help me finish this problem please and Thank you.
Find the maximum or minimum and state the domain and range of the function.
f(x) = 3 - x2 - 6x
Maximum Answer
12, - Also don't know what the other number is to this problem.
Minimum Answer
Undefined opens down
Domain Answer
Not sure what the answer is for this one.
Range Answer
(-infinity, 12)
Click here to see answer by ikleyn(52751) |
Question 1046523: I think this is the right section to put this, can I please be shown how to solve a problem like this? I have many to do and can not figure. I am in the seventh grade.
Write the quadratic function in standard form that has two zeros where x = ‒2 and x = ‒5.
Click here to see answer by josgarithmetic(39613) |
Question 1046523: I think this is the right section to put this, can I please be shown how to solve a problem like this? I have many to do and can not figure. I am in the seventh grade.
Write the quadratic function in standard form that has two zeros where x = ‒2 and x = ‒5.
Click here to see answer by ikleyn(52751) |
Question 1046523: I think this is the right section to put this, can I please be shown how to solve a problem like this? I have many to do and can not figure. I am in the seventh grade.
Write the quadratic function in standard form that has two zeros where x = ‒2 and x = ‒5.
Click here to see answer by MathTherapy(10549)  |
Question 1046523: I think this is the right section to put this, can I please be shown how to solve a problem like this? I have many to do and can not figure. I am in the seventh grade.
Write the quadratic function in standard form that has two zeros where x = ‒2 and x = ‒5.
Click here to see answer by solver91311(24713)  |
Question 1046432: Suppose that data for 57 randomly selected female high school athletes was collected on the maximum number of pounds they were able to bench press. The data are roughly bell shaped, with
x overbar equals x=74.2
and
s=13.9.
Use the empirical rule to describe the distribution.
Use the empirical rule to describe the distribution.
Approximately&; 68% of the observations fall within the interval?
Approximately&; 95% of the observations fall within the interval?
all or nearly of the observations fall within the interval?
Click here to see answer by Boreal(15235) |
Question 1046959: Is there a relationship between the weight and price of a mountain bike? The following data set gives the weights and prices for ten mountain bikes. Let the expanatory variable x be the weight in pounds and the response variable y be the bike's price.
Weight (LB)
30
33
30
27
37
31
29
35
35
29
Price ($)
1100
360
560
590
140
1020
710
920
170
460
a. Construct a scatterplot. Interpret.
b. Find the regression equation. Interpret the slope in context. Does the y-intercept have contextual meaning?
c. You decide to purchase a mountain bike that weighs 3232 pounds. What is the predicted price for the bike?
a. Which scatterplot below correctly shows the data?
A.
25
40
0
1200
x
y
x y graph
B.
25
40
0
1200
x
y
x y graph
C.
25
40
0
1200
x
y
x y graph
Your answer is correct.D.
25
40
0
1200
x
y
x y graph
The scatterplot shows
a moderate negative
association between the two variables.
b. The regression equation is ModifyingAbove Y(^hat)=()+x
(Round to two decimal places as needed.)
Click here to see answer by ewatrrr(24785)  |
Question 1047022: Hello,
I need help with the following problem:
A mathematician works for  hours per day and solves  problems per hour, where and are positive integers and  . One day, the mathematician drinks some coffee and discovers that he can now solve  problems per hour. In fact, he only works for  hours that day, but he still solves twice as many problems as he would in a normal day. How many problems does he solve the day he drinks coffee?
Thank you,
Nicole
Click here to see answer by robertb(5830)  |
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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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14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 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