Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 137503: Solve by the elimination method.
0.3x - 0.2y = 4
0.5x + 0.5y = -45/17 (this is a fraction that is -)
I have no idea how to solve this, what do i do with that fraction? Help please.
Click here to see answer by stanbon(75887)

Question 137501: The perimeter of a rectangle is 144 m. The length is 9 m more than twice the width. Find the dimensions.
Do I just multiply each (144, and 9m) 2 and that is the answer?
Click here to see answer by vleith(2983)

Question 137499: Solve by the substitution method.
4x+7y = 34
-3x+y = 12
Can someone please HELP me with this problem. I do not understand it at all!!
Click here to see answer by checkley77(12844)

Question 137499: Solve by the substitution method.
4x+7y = 34
-3x+y = 12
Can someone please HELP me with this problem. I do not understand it at all!!
Click here to see answer by vleith(2983)

Question 137490: Solve the system of equations by graphing. Then classify the system as consistent or inconsistent; and the equations as dependent or independent.
3x-y=23
3x+4y=13
HELP
Click here to see answer by checkley77(12844)

Question 137552: Please Help -- 6(x^2 - 2) = 12
Click here to see answer by oscargut(2103)

Question 137593: Problem: Solve polynomial inequality and graph the solution set on a real number line.
(x+1)(x+2)(x+3)>=0
I have set each of the terms to equal 0.
x+1=0 x+2=0 x+3=0
x=-1 x=-2 x=-3
Then I placed these three numbers on a number line as boundary points.
I used the following test points:
-1.5 which was >=0 (true)
-2.5 which was not >=0 (false)
-4 which was not >=0 (false)
0 which was >=0 (true)
I am confused on how to plot this on the number line and write the solution set in set builder notation. I think that I would use [ at -1 and go right, but I am not clear on whether the next point would be set at -2 or -3.
I would have [-1, infinity) and ?
{xIx>=-1 and ?}
Can you help me finish solving this problem. Thank you.

Click here to see answer by solver91311(24713)

Question 137655: Solve by the elimination method.
9x-9y=36
7y-3x= -14
What is the solution of the system?
Can someone explain this to me? I do not understand this at all...not of it.
Click here to see answer by scott8148(6628)

Question 137656: Solve by the elimination method.
0.05x+0.25y=11
0.15x+0.05=12
What is the solution of the system?
Again can someone explain how I am supposed to do this? I do not seem to understand anything that anyone has said. I am getting soooooo aggrevated.
Click here to see answer by ankor@dixie-net.com(22740)

Question 137738: please help me with this equation
(m+1)(m-1)=0
Click here to see answer by solver91311(24713)

Question 137741: Please help me solve this problem: f(x) = x^2-4x /2x^3 +2x^2-12x. The first section up to the 4x is on top of the fraction bar and everything else after it is below the fraction bar.
Click here to see answer by stanbon(75887)

Question 137766: x^2-10x-1=-10
Using quadratic formula
Click here to see answer by checkley77(12844)

Question 137765: x^2-3x=-6x-1

Click here to see answer by checkley77(12844)

Question 137739: please help me with this problem
(y-2)^2=5
Click here to see answer by checkley77(12844)

Question 137737: please help me solve this
(a-7)(2a+5)=0
Click here to see answer by checkley77(12844)

Question 137736: 1-4w^2=w^2+11
Click here to see answer by checkley77(12844)

Question 137704: Please solve and explain this quadratic equation. I still don't quite understand how to solve and graph it. thanks!
y=(x-3)^2-5
Click here to see answer by ankor@dixie-net.com(22740)

Question 137834: How do you find a quadratic equation if you are only give the solution? Is it possible to have different quadratic equations with the same solution? Explain. give an example.
Thanks,
ts
Click here to see answer by stanbon(75887)

Question 137833: Describe what the graph of interval [-4,10] looks like.
Can someone please help me with this. I am supposed to explain this in 50 words. How do i write something in words that i barely can do with the numbers??? Please help.
Click here to see answer by stanbon(75887)

Question 137867: A lumber company can convert logs into plywood or lumber. The mill turns out twice as many units of plywood as lumber. It makes a profit of $25 on a unit lumber and $50 on a unit of plywood. How many of each unit must be produced in order to make a profit of $12750?
The lumber company must produce and sell ?? units of lumber and ?? units of plywood to make a profit of $12750.
I am so bad with word problems also, can someone help.
Click here to see answer by stanbon(75887)

Question 137933: The volume of a square pyramid is given by the formula V=1/3hx(to the 2nd power), where h is the height of the pyramid and x is the length of one side of the base. A pyramind with a height of 15 ft. has a voulme of 2880 ft. (to the 3rd power) What is the length of one side of the base?
Click here to see answer by vleith(2983)

Question 137938: Please help me solve the quadratic equation. I Have to show whether concave up or concave down? Thanks!
y= -(x-2)^2
Click here to see answer by dolly(163)

Question 137880: The college paid $1718 for an order of 47 calculators. The store paid $10 for each scientific calculator. The others were all graphing calculators these calculators cost $58 each. How many of each type a calculator were sold?
Help again please, no clue how this is done.
Click here to see answer by ankor@dixie-net.com(22740)

Question 137937: Please help me solve the quadratic equation. I Have to show whether concave up or concave down? Thanks!
y=(-X^2+4X+5)
Click here to see answer by checkley77(12844)

Question 137936: Please help me solve the quadratic equation. I Have to show whether concave up or concave down? Thanks!
y=(-X^2+4X+5)
Click here to see answer by checkley77(12844)

Question 137987: I have one more word problem that I cannot do correctly. I need some serious hlp.
The hockey team receives 2 points when they win and 1 point when they tie. One season a team won the championship with 69 points. They won 12 more games than they tied. How many wins and how many ties did the team have?
Help please, I still do not get how to do these........
Click here to see answer by stanbon(75887)

Question 138035: What is the vertex of 2x squared minus 8x plus 3
Click here to see answer by stanbon(75887)

Question 138013: Hello everyone, it has been a while since I have had to ask for help, but I really need help now and would appreciate your help. I am taking an algebre class and of course it gets harder as it goes well I am at the 'stumpted' stage.
Solve the system of equations by graphing. Then classify the system as consistent or inconsistent; and the equations as dependent or independent.
y=-x-12
5x-4y=3
Click here to see answer by stanbon(75887)

Question 138101: using quadratic formula
4x^2-12x+11=0

Click here to see answer by stanbon(75887)

Question 138082: An airplane flies 738 mi against the wind and 1062 mi with the wind in a total time of 9 hours. The speed of the airplane in still air is 200 mi/h. What is the speed of the wind?
Click here to see answer by checkley77(12844)

Question 138131: Would someone please show the graph and whether concave up or concave down?
y= -(x-2)^2
y= -(x^2-4x+4)
Click here to see answer by checkley77(12844)

Question 138130: Would someone please show the graph and whether concave up or concave down?
y= -(x-2)^2
y= -(x^2-4x+4)
Click here to see answer by checkley77(12844)

Question 138085: What should be the diameter (d) of a pizza so that it has the same areas as two 10-in.-diameter pizzas? Do you get more to eat with a 15-in. pizza or two 10-in. pizzas?
Click here to see answer by scott8148(6628)

Question 138058: The perimeter of a rectangle is 144 inches. The length exceeds the width by 46 inches. Find the length and the width.
The length in inches ??
The width in inches ??
Help me please. I am so failing this clas s Ijust cant grasp this stuff. Help!!
Click here to see answer by scott8148(6628)

Question 138033: Hockey teams receive 2 points if they win and 1 point for a tie. One season a team won a championship with 54 points. They won 9 more games than they tied. How many wins and how many ties did the team have?
Help me please I am terrible with these word/math problems.
Click here to see answer by scott8148(6628)

Question 138029: Solve by the substitution method.
4x+4y=-4
-2x+y=11
What is the solution to the system?
Help with this too please?!?!!
Click here to see answer by scott8148(6628)

Question 138228: Given -x^2-6x-3, is the vertex a maximum or minimum for the function? What is the value fo that maximum or minimum?
There is nothing in my book about maximums and minimums, please help!
Click here to see answer by solver91311(24713)

Question 138240: Solve
- 3/4 x>_ -5/8
The solution set is
Can someone please help with this one. This time I am actually getting some of my home work done AND understand it. This chapter is easier than the last few have been. or at least so far it (I dont wanna speak too soon) Thanks.
Click here to see answer by solver91311(24713)

Question 138251: Solve
0.7x + 1 <_ 1.5x -6 (the _ is supposed to be under the <)
The solution is xlx? ?
Can you help with this please?
Click here to see answer by scott8148(6628)

Question 138242: Solve.
2x + 1 < 13
The solution is
Click here to see answer by scott8148(6628)

Question 138245:
6x^2-3x=-2
Click here to see answer by checkley77(12844)

Question 138255: Solve
3/5 (3x-1) > 12
Use the set-builder notation to describe the complete solution.
Help me what the heck is set-builder notation???? HELP
Click here to see answer by stanbon(75887)

Question 138266: xsquared - 11x + 24

Click here to see answer by checkley77(12844)

Question 138418: How do you solve the equation? Please help thanks
(x + 2)(x-4) = 0

Click here to see answer by scott8148(6628)

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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