Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 397812: Jane Axia knows that -7 is the only solution of an unknown quadratic equation. She wants to find the quadratic equation that has this solution. How do you find a quadratic equation if you are only given one solution? Explain your reasoning to Jane Axia.
Click here to see answer by CharlesG2(828)  |
Question 398079: Mathmaticians have been searching for a formula that yeilds prime numbers. One such formula was x^2-x+41. Select some numbers for x. Substitute them in the formula, and see if prime numbers occur. Try to find a number for x that when susitituted in the formula yeilds a composite number. Im confused and dont understand.
Click here to see answer by stanbon(57250) |
Question 398138: word problem associated with quadratic equation chapter::
a motorboat maintained a constant speed of 12 mph relative to the water going 23 miles upstream then returning. Total time for the trip was 24 hours. Using this information provided, what is the speed of the current in mph?
Click here to see answer by ankor@dixie-net.com(15639)  |
Question 398175: Dear sir, pLease help me on this problem, I got stuck,
1) A peacock is sitting on the top of a pillar which is 9m high .from a point 27m away from the bottom of pillar ,a snake is coming to its hole at the base of the pillar. seeing the snake the peacock pounces on it. if their speeds are equal ,at what distance from the hole is the snake caught?
Click here to see answer by scott8148(6628)  |
Question 398520: How do you solve (x-1/2)²=1 i've tried to square root both sides i put them under the same denominator which is 2. Then i dropped them and i got 2x-1=(square root)1 +1. Then i added +1 to each side and my final answer was x=1+(square root)1 (all divided by) 2 BUT it is not one of the answers on my homework sheet. Hope you can help, Thank You!
Click here to see answer by stanbon(57250) |
Question 398670: This is my first time using this site, so I apologize ahead of time if I do something wrong. I'm having trouble with this problem in my Algebra II homework and I was wondering if you could help me out.
*For the graph of y = ax^2 + bx + c, show that the y-coordinate of the vertex is (I don't know how to write fractions on here) -b^2 over 4a + c.
I thought about this one for a long time and I just can't seem to understand it. Help please?
-thank you for your time.
Click here to see answer by stanbon(57250) |
Question 398901: State whether the equations represent a linear, quadratic, or exponential function
1) y=2^x^2
I thought this would be exponential but not sure since the ^x is not a number and that is squared.
2)10x+7-y=0
At first I thought this was linear but to make it in linear format it would be 10x+7=y which is not y=mx+b so I now think this is not any of the options.
3)y=10^2^x
I feel this is exponential.
Am I correct? So confused.
Click here to see answer by jsmallt9(3296) |
Question 398901: State whether the equations represent a linear, quadratic, or exponential function
1) y=2^x^2
I thought this would be exponential but not sure since the ^x is not a number and that is squared.
2)10x+7-y=0
At first I thought this was linear but to make it in linear format it would be 10x+7=y which is not y=mx+b so I now think this is not any of the options.
3)y=10^2^x
I feel this is exponential.
Am I correct? So confused.
Click here to see answer by lwsshak3(6472) |
Question 399108: John and Chris Maney have designed a new in-ground swimming pool for their backyard. The pool is rectangular and measures 30 feet by 20 feet. They have also designed a tile border to go around the pool. The tile border covers 216 square feet in area. What is the width x of this tile border?
Click here to see answer by ankor@dixie-net.com(15639) |
Question 399329: cynthia besch wants to buy a rug for a room that is 12 ft wide and 15 ft long. she wants to leave a uniform strip of floor around the rug. she can afford to buy 108 ft^2 of carpeting. what dimensions should the rug have?
Click here to see answer by mananth(12270)  |
Question 399331: Solve quadratic equation using the following steps x2 =12x -64 = 0
a) Move the constant term to the right side of the equation
b) Multiply each term in the equation by four time the coefficient of the x2 term
c) Square the coefficient of the original x term and add it to both sides of the equation
d) Take the square root of both sides
e) Set the left side of the equation equal to the negative square root on the right side of the equation and solve for x
Click here to see answer by mananth(12270) |
Question 399512: use the quadratic formula to solve the equation
x^2-x=-9
the solution set is {_}
T
ype an exact answer,using radicals as needed. Express complex numbers in terms of i. Use intergers or fractions for any numbers in the expression. Use comas to seperate answers as needed.
Click here to see answer by Alan3354(30983)  |
Question 399512: use the quadratic formula to solve the equation
x^2-x=-9
the solution set is {_}
T
ype an exact answer,using radicals as needed. Express complex numbers in terms of i. Use intergers or fractions for any numbers in the expression. Use comas to seperate answers as needed.
Click here to see answer by josmiceli(9661)  |
Question 399543: During a chemistry experiment, the cork in
a 0.6-foot tall beaker with an effervescent so-
lution pops off with an initial velocity of 23
feet per second. The quadratic model for the
situation is
h = −16t^2 + vt + s,
where v is the initial velocity, t is in seconds,
and s is the initial height.
How many seconds does it take for the cork
to hit the table?
Answer in units of sec.
Click here to see answer by josmiceli(9661) |
Question 399586: f(x) = −2x^2− 4x + 15 please do step by step so i can understand
1.Express the quadratic function in standard form. how did you get the numbers
F(x)=
2.vertex (x, y) = how did you get the numbers
3.x-intercepts (x, y) = Small value)
4.(x, y) = larger value)
5.y-intercept (x, y) =
graph and where do the numbers meet???
Thank you soo much...
Click here to see answer by solver91311(16872)  |
Question 399586: f(x) = −2x^2− 4x + 15 please do step by step so i can understand
1.Express the quadratic function in standard form. how did you get the numbers
F(x)=
2.vertex (x, y) = how did you get the numbers
3.x-intercepts (x, y) = Small value)
4.(x, y) = larger value)
5.y-intercept (x, y) =
graph and where do the numbers meet???
Thank you soo much...
Click here to see answer by edjones(7569)  |
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