Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 180502: Steve traveled 150 miles at a certain speed. Had he gone 20mph faster, the trip would have taken 2 hours less. Find the speed of his vehicle
Click here to see answer by stanbon(57307)

Question 180490: 4. The Hudson River flows at a rate of 5 miles per hour. A patrol boat travels 40 miles upriver, and returns in a total time of 6 hours. What is the speed of the boat in still water?
Click here to see answer by solver91311(16877)

Question 180555: Simply the expression:
2n^2y^19n^11y^52
Click here to see answer by Mathtut(3670)

Question 180438: The number of units, n, of a commodity sold at price ,p, is given by n= -0.2p + 50. The revenue is the product of the selling price and the number of units sold. The maximum revenue for this commodity is?
Click here to see answer by ankor@dixie-net.com(15649)

Question 180562: A rectangular garden has dimensions of 15 feet by 11 feet. A gravel path of uniform width is to be built around the garden. How wide can the path be if there is enough gravel for 192 square feet?
Click here to see answer by nerdybill(6958)

Question 180567: The directions say to solve using the quadratic formula. Round to the nearest tenth if necessary.
The problem is written as follows:

Click here to see answer by nerdybill(6958)

Question 180567: The directions say to solve using the quadratic formula. Round to the nearest tenth if necessary.
The problem is written as follows:

Click here to see answer by mgmoeab(28)

Question 180564: Steve traveled 150 miles at a certain speed. Had he gone 20mph faster, the trip would have taken 2 hours less. Find the speed of his vehicle.
Click here to see answer by Alan3354(30993)

Question 180571: What type of solution do you get for quadratic equation where D<0? Give reason for your answer. Also provide an example of such a quadratic equation and find the solution of the equation.
Click here to see answer by Alan3354(30993)

Question 180570: If x=-3 and x=4 then form a quadratic equation
Click here to see answer by Mathtut(3670)

Question 180563: A business invests $8,000 in a savings account for two years. At the beginning of the second year an additional $2,500 is invested. At the end of the second year, the account balance is $11,445. What was the annual interest rate?
Click here to see answer by Mathtut(3670)

Question 180566: square root of 2x^2 - 4x - 7*square root of 2 = 0
Click here to see answer by user_dude2008(1861)

Question 180565: The Hudson River flows at a rate of 5 miles per hour. A patrol boat travels 40 miles upriver and returns in a total time of 6 hours. What's the speed of the boat in still water?
Click here to see answer by HyperBrain(694)

Question 180589: 13) Solve by using quadratic formula x2 – 6x + 10 = 0
14) Solve by using quadratic formula x2 – 4x + 29 = 0

Click here to see answer by vleith(2825)

Question 180569: Determine whether the following have a solution or not. Justify answer.
x^2+3x-15=0
x^2+x+4=0
x^2-4x-7=0
x^2-8x+16=0
2x^2+3x+7=0
x^2-4x-77=0
3x^2-7x+6=0
4x^2+16x+16=0
Click here to see answer by vleith(2825)

Question 180588: 13) Solve by using quadratic formula x2 – 6x + 10 = 0
14) Solve by using quadratic formula x2 – 4x + 29 = 0

Click here to see answer by checkley77(12569)

Question 180572: Create a real life situation that fits into the equation (x+3)(x-5)=0 and express the situation as the same equation.
Click here to see answer by Alan3354(30993)

Question 180501: A business invests $8,000 in a savings account for two years. At the beginning of the second year, an additional $2,500 is invested. At the end of the second year, the account balance is $11,445. What was the annual interest rate?

Click here to see answer by ankor@dixie-net.com(15649)

Question 180687: I need help please show me an example of a complex roots equation. Thanks
Click here to see answer by stanbon(57307)

Question 180687: I need help please show me an example of a complex roots equation. Thanks
Click here to see answer by josmiceli(9669)

Question 180712: My book gives an example of an quadratic equation, but I do not understand how it has been worked. Here is the one that I have to turn in on my home work x2-2x-13=0,and here is the example from the book: My e-mail address is, glen.a.harris@windstream.net
x2+3x-10=0
x2+3x=10
4x2+12x=40
4x2+12x+9=40+9
4x2+12x+9=49
2x+3=+7
2x+3=7 2x+3=-7
2x=4 2x=-10
x=2 x=-5

Click here to see answer by jim_thompson5910(28555)

Question 180709: Linear Systems Problem Solving
4. To run a 30-s ad during a weekday morning, one radio station charges a fixed cost of $400, plus $150 for each day the ad is run. A second radio station charges a fixed cost of $300, plus $200/day. The costs can be modelled by the following equations, where C is the total cost and n is the number of days for which ad is run.
Station 1:C=150n+400
Station 2:C=200n+300
a) Find the missing element in the ordered pair ( , 700) that satisfies both equations and is in the form (n, C).
b) Explain what your ordered pair from part a) means for both radio stations.
c) Which station has the lower cost for running a 30-s ad for 5 weekday mornings? Hint: Find (5, ) for each equation.
Thankssssssssssssssssssssss alottttttttttttttt pleaseeeeeeeeeeeeeeeeeeeeeeeeeeee
Click here to see answer by Fombitz(13828)

Question 180765: Linear Systems
3. The arms of an angle lie on the lines x+4y=9 and 3x-2y=13. What are the coordinates of the vertex of the angle?
pleaseeeeeeeeeeeeeeeee
Thank you very much
Click here to see answer by jim_thompson5910(28555)

Question 180766: Linear Systems Problem Solving
3. One equation of a system is 2x-y=5. Write a second equation so that the system has
a) no solution
b) infinitely many solutions
c) one solution, (3, 1). pleaseeeee
Thanks a lotttt
Click here to see answer by user_dude2008(1861)

Question 180707: Linear Systems
1. Solve by graphing. Check each solution.
a) y=x-3 b) y=2x-1 c) x+3y=2 d) 3x+2y=6
y=3-x y=-x+5 x-y=6 y=4-x
Thank you very much pleaseeeeeeeeeeeeee
Click here to see answer by elima(1433)

Question 180786: Connect English With Mathematics and graphing Lines
3. For each of the following, write a word or phrase that has the opposite meaning.
a) decreased
b) subtracted
c) less than
d) minus
e) added to
f) more than
Sorry, because my english is not good help me pleaseeee and thank you very much.
Click here to see answer by Earlsdon(6287)

Question 180789: x2 -6x-7=0
Click here to see answer by jim_thompson5910(28555)

Question 180787: Connect English with Mathematics and Graphing Lines
4. Translate each sentence into an algebraic equation.
a) One sixth of a number, increased by 15, is 42.
b) Three times a number, decreased by four, is five more than six times the number.
c) When tickets to a soccer game cost $4 each, the revenue at the gate is $320.
d) the total length of the base and height of a triangle 15cm.
PLeaseeeeeeeeeeeeeeeeeee thankssssssssssssssss alottttttttttttttttttt
Click here to see answer by eperette(173)

Question 180814: Throwing a wrench. An angry construction worker throws his wrench downward from a height of 128 feet with an ?
initial velocity of 32 feet per second. The height of the wrench above the ground after t seconds is given by S(t)= -16t^2 -32t + 128.
a) what is the height of the wrench after 1 second?
b) how long does it take for the wrench to reach the ground?

Click here to see answer by jim_thompson5910(28555)

Question 180830: 4. Create a real-life situation that fits the equation (x + 3)(x - 5) = 0 and express the situation as the same equation.
Click here to see answer by stanbon(57307)

Question 180754: The graph of y=1/3(x+5)^2-10 has?
what vertex and what range?
Click here to see answer by Mathtut(3670)

Question 180849: the diagram shows the a right angled triangle. based on the length of the sides of the triangle form a quadratic equation in term of y.
AB=(y+3)cm
BC=3y cm
AC= (4y-3) cm
help me pless...tq for helping me,....

Click here to see answer by stanbon(57307)

Question 180852: a train normally travels 240km at a certain speed. one day, due to bad weather, the train's speed is reduced by 20km/h so that the journey takes two hours longer. find the normal speed.
Click here to see answer by Alan3354(30993)

Question 180877: How do you find a quadratic equation if you are only given the solution
Click here to see answer by nerdybill(6958)

Question 180883:
Click here to see answer by user_dude2008(1861)

Question 180884: Please help me to solve this problem: , Determine whether the following equation have a solution or not? Justify your answer.
Click here to see answer by jim_thompson5910(28555)

Question 180885: (2x - 1 )2 -4(2x -1)+ 2 =0
Not sure about my solution
Click here to see answer by jim_thompson5910(28555)

Question 180881: The Hudson River flows at a rate of 5 miles per hour. A patrol boat travels 40 miles upriver, and returns in a total time of 6 hours. What is the speed of the boat in still water?

Click here to see answer by Alan3354(30993)

Question 180892: I need to find the vertex form/function in form, axis of symmetry and max or min of the following equation, and am really confused.
y=x^2+6x+5
Click here to see answer by jim_thompson5910(28555)

Question 180997: Find the combination of 9 objects taken 6 at a time.
Did I do this correctly?
C(9,6)= 9! over 6!(9-6)! = 9! over 6!3!= 9x8x7x6! over 6!3! = 504 over 3 = 168
Click here to see answer by stanbon(57307)

Question 180999: Let f(x)=3x-7 and g(x)=(x+2)^2
Find the composite function f(g(x)).
Did I do this correctly?
3(x+2)^2-7
3x^2+36x+4-7
3x^2+36x-3
Click here to see answer by Edwin McCravy(8908)

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