Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 181000: 3xsquared-6x=24
Click here to see answer by stanbon(57407)

Question 180998: 3. Walt made an extra $12,000 last year from a part-time job. He invested part of the money at 7% and the rest at 9%. He made a total of $970 in interest. How much was invested at 7%?
Click here to see answer by josmiceli(9697)

Question 181018: Can you help me with this please.
Do exponential functions only model phenomena that grow, or can they also model phenomena that decay? Explain what is different in the form of the function in each case.
True or false: The function "f(x) = 4x" grows four times faster than the function "g(x) = x". Explain.
Click here to see answer by stanbon(57407)

Question 181025: Joe has a collection of nickles and dimes that is worth $6.05. If the number of dimes was doubled and the number of nickles was decreased by 10,the vlue of th ecoins would be $9.85. How many dimes does he have?
Click here to see answer by josmiceli(9697)

Question 181032: 3xsquared-6x=24
Click here to see answer by Mathtut(3670)

Question 181076: The members of a flying club plan to share equally the cost of a $200,000 airplane. The members want five more people to join the club so that the cost per person will decrease by $2,000. How many members are currently in the club?
Click here to see answer by Mathtut(3670)

Question 181082: Solve this quadratic equation using the quadratic formula.
2x2 - 2x = 1

Click here to see answer by eperette(173)

Question 181024: Write three quadratic equations.with a, b, and c ( coefficients x2, x and the constant) are integers, rational mumbers and irrational numbers.
Click here to see answer by solver91311(16897)

Question 181199: I need to solve the equation: 2n2-7n-3=0
Click here to see answer by Mathtut(3670)

Question 181171: Connect English with mathematics and Graphing Lines
5. Find the point of intersection for each pair of lines by graphing. check your answers.
a) y=2x+5
y=x+1
b) y=-2x+3
y=3x+8
Pleaseeeeeee i need it today and my english is not very good.
Click here to see answer by Mathtut(3670)

Question 181269: Will you PLEASE HELP. I am clueless on how to work these problems.
A cell divides into two identical copies every 4 mintues. How many cells will exist after 5 hours.
The level of thorium in a sample decreases by a factor of one-half every 2 million years. A meteorite is discovered to have only 8.6% of its original thorium remaining. How old is the meteorite?

Thanks for your help.
Click here to see answer by stanbon(57407)

Question 181328: What is the equation by factoring 3x^2 = 75x
Click here to see answer by vleith(2825)

Question 181361: Problem Solving
13. Jeff clears driveways in the winter to make some extra money. he charges $15/h. Hesketh's Snow Removal charges $150 for the season.
a) Write an equation for the amount Jeff charges to clear a driveway for the season.
b) Write an equation for Hesketh's Snow Removal.
c) What is the intersection point of the two linear equations?
d) In the context of this question, what does the point of intersection represent?
Pleaseeeeeeeee i need it today and thank you very much.
Click here to see answer by solver91311(16897)

Question 181375: Solve equation by factoring
x^2-4x=21
standard Form
x^2-4x-21=0
Thanks for your help!
Click here to see answer by solver91311(16897)

Question 181354: Problem Solving
12. LC Video rents a game machine for $10 and video games for $3 each. Big Vid rents a game machine for $7 and video games for $4 each.
a) Write a linear equation to represent the total cost of renting a game machine and some video games from LC Video.
b) Write a linear equation to represent the total cost of renting a game machine and some video games from Big Vid.
c) Find the point of intersection of the two lines from part a) and b).
d) Explain what the point of intersection represents in this context.
Thanksssssss and i need it today..
Click here to see answer by Mathtut(3670)

Question 181386: Problem Solving
19. Graph the equations 3x-y+1=0, y=4, and 2x+y-6=0 on the same grid. Explain what you find.
Pleaseeeeeeee i need it today and thanksssssssss
Click here to see answer by Mathtut(3670)

Question 181387: Problem Solving
20. a) Can you solve the linear system y=2x-3 and 4x-2y=6? Explain your reasoning.
b) Can you solve the linear system y=2x-3 and 4x-2y=8? Explain your reasoning.
c) Explain how you can tell, without solving, how many solutions a linear system has?
pleaseeeeeeeeeee i need it right now and thankssssssssss
Click here to see answer by stanbon(57407)

Question 181400: For the quadratic function : f(x) = 2x^2 - 4x -6, find:
a. The x intercepts and the y intercepts
b. THe domain and range
c. The axis of symmetry and the vertex.
d. Find the minimum value of the function.
Click here to see answer by solver91311(16897)

Question 181439: an orange grower has 400 crates or fruit ready and will have 20 more for each day the grower waits to sell. the present price is $60 per crate and will drop $2 per crate per day. in how many days should the grower ship the crop to maximize income?
Click here to see answer by nerdybill(6963)

Question 181447: What are they asymptotes of the functions "f(x) = 4^x" and "g(x)= log5x" ***The 5 is opposite of ^5. I am unable to find that symbol on my computer.***
This is from my Elementary and Intermediate Algebra class.
Thank you in advance.
Click here to see answer by stanbon(57407)

Question 181398: For the quadratic function f(x) = x^2 + 2x -8 Find:
a. THe axis of symmetry and the vertex.
b. THe x-intercepts and y intercepts.
c. The domain and range.
d. Does the function have a maximum or minimum value.

Click here to see answer by Mathtut(3670)

Question 181448: The level of thorium in a sample decreases by a factor of one-half every 2 million years. a meteorite is discovered to have only 8.6% of its original thorium remaining. How old is the meteorite?
Click here to see answer by stanbon(57407)

Question 181352: What is the quadratic function f(x)=x^2-2x-8

Click here to see answer by Mathtut(3670)

Question 181384: Problem Solving
Gina works for a clothing designer. She is paid $80/day plus $1.50 for each pair of jeans she makes. Dexter also works for the designer, but he makes $110/day and no extra money for finishing jeans.
a) Write an equation to represent the amount that Gina earns in 1 day. Graph the equation.
b) Write an equation to represent the amount that Dexter earns in 1 day. Graph this equation on the same grid as in part a).
c) How many pairs of jens must Gina to make in order to make as much in a day as Dexter?
Pleaseeeeeeeeeee i need it today and thank you very much

Click here to see answer by Mathtut(3670)

Question 181554: Problem Solving
11. Fitness Club CanFit charges a $150 initial fee to join the club and a $20 monthly fee. Fitness "R" Us charges an initial fee of $100 and $30/month.
a) Write an equation to represent the cost of membership at CanFit.
b) Write an equation to represent the cost of membership at Fitness "R" Us.
c) Graph the two equations.
d) Find the point of intersection.
e) What does the point of intersection represent?
f) If you are planning to join for 1 year, which club should you join? Explain your asnwer.
Pleaseeeeeeeeeee my english is not very good and i need it today and thankssssssssss lotttttttttttt
Click here to see answer by solver91311(16897)

Question 181579: Solve the quadratic equation using any method you wish.
49x^2 - 14x + 1 = 0
Click here to see answer by solver91311(16897)

Question 181591: I need help wiith this;
im not really sure where to start.
this is on my worksheet called- quadratic equations and complex numbers.

(-6+12i)+(4-i)
Im not really sure where to start.
I tried to look in the book to see how to do it, but that confused me more.
I tried switching the 12i over to the other side, and the same with 4.
But i didnt get the right answer, im sure.

Click here to see answer by vleith(2825)

Question 181594: Okay, I think i did this right, but i'm not sure.
the question is;
4i(-7+i)
i got 24.
is that right?
Click here to see answer by vleith(2825)

Question 181594: Okay, I think i did this right, but i'm not sure.
the question is;
4i(-7+i)
i got 24.
is that right?
Click here to see answer by solver91311(16897)

Question 181595: On my worksheet, it has subtracting and addition.
like, (-6+12i)+(4-i)
I was explained the addition, now it is easy to me.
but my question is...should i do it differently if it says subtract?
like...
(3-i)-(-4+9i)

do you do it differently than the addition one?
Click here to see answer by solver91311(16897)

Question 181601: Okay this is my last question.
on this itsays...
14-2i Over 3+i.
I dont know if that makes sense to you
But i think i learned something about taking the conjucate of 3+i which is 3-1, but i dont know where to go from there, or if im even doing it right.

Click here to see answer by stanbon(57407)

Question 181603: The domain of y = sqrt 3x +6 is?
The range of y = sqrt3x + 6 is?
Click here to see answer by solver91311(16897)

Question 181600: Okay this is my last question.
on this it says...

I don't know if that makes sense to you
But I think I learned something about taking the conjucate of 3+i which is 3-1, but I dont know where to go from there, or if im even doing it right.

Click here to see answer by Edwin McCravy(8912)

Question 181602: Graph of the parabola y= 1/2x - 2x - 1
If the graph of the parabola is moved up 3 units what would the coordinates of its vertex be?
Click here to see answer by Mathtut(3670)

Question 181574: Problem Solving
11. Fitness Club CanFit charges a $150 initial fee to join the club and a $20 monthly fee. Fitness "R" Us charges an initial fee of $100 and $30/month.
a) Write an equation to represent the cost of membership at CanFit.
b) Write an equation to represent the cost of membership at Fitness "R" Us.
c) Graph the two equations.
d) Find the point of intersection.
e) What does the point of intersection represent?
f) If you are planning to join for 1 year, which club should you join? Explain your asnwer.
Pleaseeeeeeeeeee my english is not very good and i need it today and thankssssssssss lotttttttttttt
i need it right noww
Click here to see answer by solver91311(16897)

Question 181558: 11. Fitness Club CanFit charges a $150 initial fee to join the club and a $20 monthly fee. Fitness "R" Us charges an initial fee of $100 and $30/month.
a) Write an equation to represent the cost of membership at CanFit.
b) Write an equation to represent the cost of membership at Fitness "R" Us.
c) Graph the two equations.
d) Find the point of intersection.
e) What does the point of intersection represent?
f) If you are planning to join for 1 year, which club should you join? Explain your asnwer.
Pleaseeeeeeeeeee my english is not very good and i need it today and thanks lot can you do this one because i am really confused and i have no idea how to do it okay pleaseeeeeeeeeee
Click here to see answer by solver91311(16897)

Question 181555: Problem Solving
Brooke is planning her wedding. She compares the cost of places to hold the reception.
Limestone Hall : $5000 plus $75/guest
Frontenac Hall: $7500 plus $50/guest
a) Write an equation for cost of Limestone Hall.
b) Write an equation for cost of Frontenac Hall.
c) Use a graphing calculator to find for what number of guests the hall charges are the same.
d) In what situation is Limestone Hall less expensive than Frontenac Hall? Explain.
e) What others factors might Brooke need to consider when choosig a banquet hall?
Pleaseeeee and i need it right now my english is not very good.
Click here to see answer by solver91311(16897)

Question 181637: 6x^2 + 5x + 1=0
answer:x= -1/2 or -1/3
need a full break down of how my book got those fractions as answers
Click here to see answer by Mathtut(3670)

Question 181636: 6x^2-5x+1=0
answer:x=1/3 or 1/2
need a full break down of how my book got those fractions as answers
Click here to see answer by josmiceli(9697)

Question 181480: -6 2/3 x2 + 1 1/3 x = 2/3
A) x = (-1 +- 10i)/3
B) x = (-1 +- 3i)/10
C) x = (1 +- 3i)/-10
D) x = (-1 +- 3i)/-10
E) x = (-1 +- 10i)/-3
F) x = (2 +- 3i)/6
10. -57 3/5 x2 + 3 3/5 x = -39 3/5 x2 - 7 1/5 x + 14 2/5
A) x = {2 +- i[SQRT(75)}/10
B) x = {3 +- i[SQRT(71)]}/-10
C) x = {-3 +- i[SQRT(57)]}/7
D) x = {-3 +- i[SQRT(71)]}/-10
E) x = {-2 +- i[SQRT(75)]}/-7
F) x = {2 +- i[SQRT(39)]}/14
Click here to see answer by solver91311(16897)

Question 181686: 2x^2 - 2/3x- 1/6=0

answer: x= - 1/6 or 1/2

need a break down of how my text book got this answer
Click here to see answer by Mathtut(3670)

Question 181688: 1=3x^2+ 2x
answer x= -1 or 1/3

need a break down of how my text book got this answer
Click here to see answer by Mathtut(3670)

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