Tutors Answer Your Questions about Systems-of-equations (FREE)
Question 844459: Three are three type ingots. The first has 20gms gold, 30gms of silver and 40 gms of copper. the second has 30gms of gold, 40gms of silver and 50 gms copper. The third has 40 gms of gold, 50gms silver and 90 gms copper. What weight will be taken from each of the previous ingots to form a new ingot of 34 gms gold, 46 gms silver and 67 gms copper?
Click here to see answer by josgarithmetic(39616)  |
Question 845256: Hi
Would you please help me to answer this problem:
A pilot of a downed airplane fires the emergency flare into the sky. The path of the flare is modeled by the equation h= -0.096(d-25)^2 + 60, where h is the height of the flare in metres when its horizontal distance from where it was propelled is d metres. An emergency helicopter equipped with special binoculars has a line of sight to the spot where the flare was launched. The line of sight from the binocular is modeled by the equation 9x-10y=-14
a) solve the system and give answers rounded to two decimal places.
b) the line of sight from the binoculars spots the flare twice. How high was the flare closest to the ground when it was spotted the first time?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 846659: Joe Tyson is the kicker for his college football team. Last season he kicked 38 times and never missed. Each field goal scored 3 points and each extra point scored 1 point for a total of 70 points. Find the number of field goals and extra points that Joe made last season.
My teacher taught us an easier version of this but then she forgot to teach us the next step so I am a bit lost.
Click here to see answer by josmiceli(19441)  |
Question 847253: How to solve this algebraic question?
the value of a=4,b=7 and k =11
this is part b that I can't understand:
a*(squareroot b^2 -c)= 5k
we need to find c.
Can you give me a detailed explanation and solution to this please.thanks.
Click here to see answer by Fombitz(32388)  |
Question 853744: Use U={1,2,3,4,5,6,7,8,9,10}
A={2,3,5}
B={5,6,7,9}
C={1,4,10}
to find the set AUB
You guys are awesome!!
Click here to see answer by LinnW(1048)  |
Question 857227: Hi! I'm stuck on this question in my math and its says "Determine which of the points is a solution to the system." Hopefully I got the right topic haha :) Okay so this is the question:
y=2x-3 (4,-4);(2,1);(3,3)
4x+y=15
Thanks! -Savanah
Click here to see answer by Alan3354(69443)  |
Question 857921: I have two equations, one is a hyperbola and one is a straight line. The line is in the form of  . I am not sure what exactly the hyperbola equation was as it is not written down, but it was in a form similar to  . The problem explains that the hyperbola is the edges of two circular pools and the line is the path that goes between them. The problem states 'find the appropriate values of k' so that the path does not cross into the pools, that is, no intercepts between the line and the hyperbola. I have managed to substitute the equations together to get  . This can be turned into the quadratic equation  . Since the aim is to find appropriate values of k that make the line not cross through the hyperbola, the discriminant (  ), must be equal to less than 0 to show that there are no real roots/solutions. By substituting the a, b and c values from this quadratic equation into the discriminant, another quadratic equation is created:  . This needs to equal less than 0 for the line to not pass through the hyperbola.
I am confused as to what to do from here to find appropriate values of k and if I have done the previous steps correctly. I am sure that I am close to solving it.
The second part of this question also states, find the range of possible values. Although, I first need to figure out how to solve the first part of the question.
Please help if you can, I have literally been trying to figure this out for hours.
Click here to see answer by KMST(5328)  |
Question 858205: Hi, I am terrible at systems of equations and I have an applications of derivatives assignment with a few questions, the only one dealing with systems of equations is as follows:
For the function f(x)= ax^4 + bx^3 - 4x^2 + 2cx + 14
Determine the values of a, b, and c, such that,
f(-2)=2 , f'(-2)=16 , and f''(-2)=-8
I have tried only messing around with various numbers in my calculator for the past hour to get any number to match with the given values, and I failed
Any help would be much appreciated
Thanks
Click here to see answer by Alan3354(69443) |
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