Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 127244: Please help me solve this equation.
In the equation 5x+y=-1,What does m equal?
Click here to see answer by MathLover1(20849)

Question 127243: Please help me solve this equation.
In the equation 5x+y=-1,What does m equal?
Click here to see answer by MathLover1(20849)

Question 127308: The sum of a number, five-fourths of the number, and a third of the number is one hundred fifty-five. Find the number.
Here's what I have
x + x + 5/4 + x + 1/3 + x =155
4x + 5/4 + 1/3 =155
5/4 + 1/3= 1 7/12
4x = 1 7/12
?????
Click here to see answer by jim_thompson5910(35256)

Question 127313: The length of a rectangle is 50ft. The perimeter of the rectangle is 275ft more than the width of the rectangle. Find the width.
Here's what I have
2(50)+2w = 275-w
100+2w = 275-w
+w +w
100+3w = 275
-100 -100
3w - 175
3w/3 175/3
w=58.3333...
Click here to see answer by checkley71(8403)

Question 127319: the graph of f(x) = -5 falls in which quadrants?
Click here to see answer by josmiceli(19441)

Question 127315: Miranda is making a bow for a Christmas wreath. The bow is made from six yards of ribbon which must be cut into three pieces where two pieces are the same length and the third piece is eight times as long. Find the length of each piece.
I don't know where to even begin....HELP!!
Click here to see answer by ankor@dixie-net.com(22740)

Question 127325: A sphere has a diameter 12m. Find its volume using pi = 3.14 as an approximation.
Click here to see answer by checkley71(8403)

Question 127362: Frida is five years older than Fredelyn. In three years the product of her age and Fredelyn's age five years ago will be 9o years. zFind their present ages.
Click here to see answer by solver91311(24713)

Question 127306: A desk top has the shape of a trapezoid. The two parallel sides have lengths 2m and 2.8 m, and the distance between the sides is 1.5m. To protect the wood surface, a blotter will be made, at a cost of $25 per square meter, to cover the entire desk top. Find the total cost of the blotter.
Click here to see answer by edjones(8007)

Question 127474: What is the value of logbase2 (1/sqrt32?
Click here to see answer by josmiceli(19441)

Question 127474: What is the value of logbase2 (1/sqrt32?
Click here to see answer by bucky(2189)

Question 127473: Write an equation that best models the datd:
x- -2,0,2,4
y- 3.5,7,14,28

Click here to see answer by checkley71(8403)

Question 127464: What is the y-intercept of 4(y-1)=2(^2(x+1) Note: the 2(x+1) is the exponent .
Click here to see answer by scott8148(6628)

Question 127471: Two die- cast metal car models were purchased at the same time. The first cost $99.50 and appreciated by 10% yearly. The second cost $49.50 and appreciated 16% yearly. Algebraically determine how many years will it take for the two models to be of equal value.
Click here to see answer by ankor@dixie-net.com(22740)

Question 127467: Mary wants her $9000 GIC to double in value in nine years. What annual rate of interest is required for her to reach her goal. Assume interest is compounded annually.
Click here to see answer by ankor@dixie-net.com(22740)

Question 127472: What is the inverse of the function y=logbase2 x ?
Click here to see answer by josmiceli(19441)

Question 127475: What is the range of the function : -2(y-4)=5(^x+2) ? I think it is y such that y is greater than 4.
Click here to see answer by josmiceli(19441)

Question 127519: Find the constant term to make x^2-4x a perfect square trinomial

Click here to see answer by bucky(2189)

Question 127530: please solve these two numbers by factoring completely:
1. 9 - (2a + b)^4
2. 32a^4b - 162b^5
Click here to see answer by edjones(8007)

Question 127617: The publisher of a magazine that has a circulation of 80,000 and sells for 1.60$ a copy decides to raise the price of the magazine because of costs. By surveying the readers, he finds that he will lose 10,000 readers for each .40 $ increase. What price per copy maximizes growth?
TYVM for ANY answers =D
Click here to see answer by ankor@dixie-net.com(22740)

Question 127679: Solve for x:
a) (log base2 x)^2-(logbase2 x^2)=0
b) log base2(logbasex 64)=1
c) log base5(5x+2)=1/2 logbase5 49+logbase5 16
Click here to see answer by stanbon(75887)

Question 127692: Solve for x:
a) log base4 (x+2) + log base4 (n-4)=2
b) log base2 (x^2-2) - log base2 (1/2x+5)=1 Can someone please help me with these and show me how to check my answers ??????
Click here to see answer by stanbon(75887)

Question 127760: Simplify the logarithmetic expression log 1000 - log(10^-1) + logsqrt10.
Click here to see answer by stanbon(75887)

Question 127759: Solve:
a) t=5*logbase4 16
b) t=4*logbase1/3 3sqrt243

Click here to see answer by stanbon(75887)

Question 127753: A certain radioactive element decays exponentially with a half-life of 5 hours. Find the time that has elapsed if a 50mg sample has decayed to 17 mg.
Click here to see answer by stanbon(75887)

Question 127770: y=3x-4,where is the point on the line?
Thankss for your help.
Click here to see answer by jim_thompson5910(35256)

Question 127795: Topic: Simultaneuos equations
If possible i would like a step by step guide of the answer thanks.
x+y=9
x^2-3xy+2y^2=0
Click here to see answer by Edwin McCravy(20054)

Question 127792: Topic: Simultaneuos equations
If possible i would like a step by step guide of the answer thanks.
x+y=9
x^2-3xy+2y^2=0
Click here to see answer by checkley71(8403)

Question 128015: I am having such a time understanding how to solve...
w^4 - 20w^2 - 2 = 0.
It is not qudratic but is to be reduced to a quadratic equation in order for us to solve it. It is said to be reducible to quadratic.
I know we have to substitute u for w^2. So then the equation would be
u^2 - 20u - 2 = 0
Solving for u is...
u = 10 - radical sign 102 and
u = 10 + radical sign 102
I know the solutions are:
10 - radical sign 102 all under the same radical sign ,
10 + radical sign under radical sign 102 all under the same radical sign ,
10 - radical sign under radical sign 102 all under the same negative radical sign ,
10 + radical sign under radical sign 102 all under the same negative radical sign
My question is: Where did they get 10 and 102? I guess I do not know how to solve for u.
Can You please show the steps for this problem?
This does not come from a book.
Thank you!
Click here to see answer by solver91311(24713)

Question 128044: do you guys charge money?
Click here to see answer by solver91311(24713)

Question 128052: Solve for x:
logbase5(x+1)+logbase5(x-3)=1
Click here to see answer by solver91311(24713)

Question 127943: x^+x-2=0
Click here to see answer by scott8148(6628)

Question 127944: x^-3x-4=0
Click here to see answer by scott8148(6628)

Question 128068: Evaluate each of the following logarithms.
a) logbase7 256
b) logbase3/4 6475
Click here to see answer by stanbon(75887)

Question 128065: A car purchased in 1998 is currently valued at $12000. If it has decreased in value exponentially at a rate of 4% per year, determine the original cost of the vechicle.
I do know that the formula I should use is A=Ao(1-r)^t or some variation of it but I do not know how to fill it in ???????
Click here to see answer by mr.barrett(5)

Question 128055: Kate wants her $9000 GIC to double in value in nine years. What annual rate of interest is required for her to reach her goal. Assume interest is compounded annually.
Can this be done without using natural logs and just using "logs" OR are both of these the same thing ?????????????
Click here to see answer by scott8148(6628)

Question 128063: Michael makes an investment of $100 that he knows will triple in value in 12 years. Determine the value of his investment after 30 years.
Click here to see answer by edjones(8007)

Question 128178: Please help me,I am totally confused with this.
What is the difference between 2x^2+4xy-3 and x^2-2xy-4
Please help me!
Click here to see answer by marcsam823(57)

Question 128185: Find the exact solution for the equation.

Click here to see answer by marcsam823(57)

Question 128183: Please help me,I am totally confused with this.
What is the difference between 2x^2+4xy-3 and x^2-2xy-4
Please help me!
Click here to see answer by stanbon(75887)

Question 128183: Please help me,I am totally confused with this.
What is the difference between 2x^2+4xy-3 and x^2-2xy-4
Please help me!
Click here to see answer by solver91311(24713)

Question 128220: y=a^2+8a+16
Thank You For Your help
Click here to see answer by checkley71(8403)

Question 128294: At an airshow, a plane is in a power dive. The height of the plane, in metres above the ground , is recorded for the first six seconds.
Time(s): 1,2,3,4,5,6
Height(m): 214,180,150,124,102,84
a) Algebraically determine the quadratic function that models the path followed by the plane. Express the function in the form y=ax^2+bx+c.
b) Use the function to determine the minimum height of the plane.
Click here to see answer by stanbon(75887)

Question 128327: I dont understand what we have to do for this problem.
Working alone, Anton can install a brick patio in 2 hours less than Bill. Together Anton and Bill can install the patio in 4 hours. To the nearest tenth of an hour, how long does it take Bill to install the patio working alone?
Click here to see answer by josmiceli(19441)

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11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 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