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Question 155037: algebra of linear and quadratic expressions.
find the values of k for which the quadratic 2x^2+kx+9=0 has one real solution, and another with no real solutions.

Click here to see answer by jim_thompson5910(35256)

Question 155042: Could you please help me solve this by completing the square:
x^2+10x-8=0

Click here to see answer by oscargut(2103)

Question 155043: I'm not sure how to do this, and i need some help.
consider the equation x^2+2x=7. Prove that this equation has two real roots.
Click here to see answer by jim_thompson5910(35256)

Question 155109: how do i solve n^2-9n+14=0, by factoring?
Click here to see answer by checkley77(12844)

Question 155098: find a quadratic equation where f(2)=16 and the minimum value of f is f(-2)=-16
Click here to see answer by stanbon(75887)

Question 155157: Can someone help with the following word problem, I tried the quadratic equation but I am not getting any of the answers.
Thank you.
Hazel has a screen door whose height is 4 feet more than its width. She wishes to stabilize the door by attaching a steel cable diagonally. If the cable measures (sqrt 19)/2 ft, what are the dimensions of the door? (1 point)
A) 2 1/4 ft by 6 1/4 ft
B) 2 1/2 ft by 6 1/2 ft
C) 3 ft by 7 ft
D) 3 1/2 ft by 7 1/2 ft
Click here to see answer by stanbon(75887)

Question 155245: for what value(s) of k will the graph of y = x^2-3x+k
a) touch the x-axis
b) never meet the x-axis?
Click here to see answer by jim_thompson5910(35256)

Question 155267: solve by completing the square
2x^2+5x-1=0
the solutions are x=???????????

HELP ME!!! PLEASE
Click here to see answer by Earlsdon(6294)

Question 155269: use the quadratic equation so solve the equation

x(x+5)=-10
what is the solution set? { }
Click here to see answer by checkley77(12844)

Question 155265: solve by completing the square
2x^2+5-1=0

The solution are/is x=
Click here to see answer by stanbon(75887)

Question 155336: complete the square.
y=x^2-4x+2
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Question 155244: express the following functions in turning point form and hence sketch their graphs.
y = x^2-2x+1
Click here to see answer by checkley77(12844)

Question 155327: 1.m(7-2m)=6
2.1/x=x-2/24
3.4/x+10=4/x-1
4.x+3/x=x-4/3
5.40/x-20/x-3=8/7
Click here to see answer by stanbon(75887)

Question 155376: 1. A rectangular garden has dimensions of 18 feet by 13 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 516 square feet?
Click here to see answer by jim_thompson5910(35256)

Question 155377: 2. A business invests $10,000 in a savings account for two years. At the beginning of the second year, an additional $3500 is invested. At the end of the second year, the account balance is $15,569.75. What was the annual interest rate?
Click here to see answer by jim_thompson5910(35256)

Question 155378: 3. Steve traveled 200 miles at a certain speed. Had he gone 10mph faster, the trip would have taken 1 hour less. Find the speed of his vehicle.
Click here to see answer by jim_thompson5910(35256)

Question 155379: 4. The Hudson River flows at a rate of 3 miles per hour. A patrol boat travels 60 miles upriver, and returns in a total time of 9 hours. What is the speed of the boat in still water?
Click here to see answer by jim_thompson5910(35256)

Question 155381: 1. True or false: The function "f(x) = " grows three times faster than the function "g(x) = x". Explain.
Click here to see answer by jim_thompson5910(35256)

Question 155386: I am struggling with Algebra and quadratic equations. I do not understand how to solve the following:
solve: 3x + x(x-2)= 0
find the x-incercepts of f(x)=3x + x(x-2).
The answer is 0, -1 as shown in my text but I do not undertand how to arrive at the intercepts, I get 3x + x^2 -2x = x^2 -x =0? This does not look like a quadratic formula.
Click here to see answer by Earlsdon(6294)

Question 155388: How do you factor x^2-16x+51
Click here to see answer by Earlsdon(6294)

Question 155375: 32y^2 - 12y - 2

36x^2 + 36x + 9

3x^2 + 54x + 195

Click here to see answer by checkley77(12844)

Question 155394: I believe this is a quadratic equation: The question is: given that (x-3) and (x+4) are factors of x^3 + 6x^2-7x-60, I need to find a third first degree factor and then find the factor. I tried grouping (x^ + 6x^) - (7x + 60) I could factor x^ out of the first grouping but I can't seem to find a common factor out of the 2nd grouping.
Click here to see answer by checkley77(12844)

Question 155426: x-13(square root)X+40=0
Click here to see answer by Earlsdon(6294)

Question 155442: I am having some trouble with this word problem, can some one help out and also show me the steps, thanks a lot
Hazel has a screen door whose height is 4 feet more than its width. She wishes to stabilize the door by attaching a steel cable diagonally. If the cable measures (Sqrt 194)/2 ft, what are the dimensions of the door?
A) 2 1/4 ft by 6 1/4 ft
B) 2 1/2 ft by 6 1/2 ft
C) 3 ft by 7 ft
D) 3 1/2 ft by 7 1/2 ft
Click here to see answer by jim_thompson5910(35256)

Question 155445: How do you u solve when they are asking to solve for the pair?
s= -16t^2 + 48t (3, )
Click here to see answer by oscargut(2103)

Question 155507: solve by factoring
2x squared +x-10=0
Click here to see answer by jim_thompson5910(35256)

Question 155515: the length of a rectangle is twice the width. the perimeter is 48 in. find the dimensions of the rectangle.
Click here to see answer by oscargut(2103)

Question 155515: the length of a rectangle is twice the width. the perimeter is 48 in. find the dimensions of the rectangle.
Click here to see answer by Adam(64)

Question 155553: i need help with this question. i don't understand how to do it.
Click here to see answer by checkley77(12844)

Question 155553: i need help with this question. i don't understand how to do it.
Click here to see answer by stanbon(75887)

Question 155539: Are these parallel x+11=y and y-x=-7 What is the slope of the line x+11=y
Click here to see answer by checkley77(12844)

Question 155538: Are these parallel x+11=y and y-x=-7 What is the slope of the line x+11=y
Click here to see answer by checkley77(12844)

Question 155584: Fnd three consecutive integers whose sum is 126.

Click here to see answer by Alan3354(69443)

Question 155585: the sum of four consecutive odd integers 216.find the four integers.
Click here to see answer by stanbon(75887)

Question 155585: the sum of four consecutive odd integers 216.find the four integers.
Click here to see answer by checkley77(12844)

Question 155597: Please HELP> i am not good with fractions.
Solve by completing the square
m^2-1/2m=7/2
Click here to see answer by stanbon(75887)

Question 155598: The width of a rectangle is 2 ft less than the length. the area is 8 ft^2. Find the length and the width.
PLEASE HELP!!!
Click here to see answer by jojo14344(1513)

Question 155612: plot points of y=-6
Click here to see answer by jim_thompson5910(35256)

Question 155616: a)SOLVE 2X^2=6
b) Find the x-intercepts of f(x)=2x^2-6
What are the solutions?
What are the x-intercepts?

Thank you for any help!!!!
Click here to see answer by jim_thompson5910(35256)

Question 155620: Find the x-intercepts and y intercepts for f(x)
f(x)=x^2-8x+11
I dont know is this is correct, i got the x intercepts are (4(+-) sqrt5/2,0)

Click here to see answer by jim_thompson5910(35256)

Question 155614: 5y+8x+4=10+8x Find the slope and the y-intercept of the line.
Click here to see answer by checkley77(12844)

Question 155674: simplify (x-2)*-2(x-2)-15 *= squared
Click here to see answer by Alan3354(69443)

Question 155683: 2(x+1)^2+7(x+1)+3
Click here to see answer by stanbon(75887)

Question 155685: simplify (3x+1)^2-(2x+1)(x-5)+2 and factorise the simplified expression!! help please...!!
Click here to see answer by Edwin McCravy(20054)

Question 155685: simplify (3x+1)^2-(2x+1)(x-5)+2 and factorise the simplified expression!! help please...!!
Click here to see answer by stanbon(75887)

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