Questions on Algebra: Functions, Domain, NOT graphing answered by real tutors!

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Question 934832: If x is greater then or equal and y is greater then or equal to 0 then which quadrant holds the solution?
Click here to see answer by Fombitz(32388)

Question 934641: the dollare price for a barrel of oil sold at a certain oil refinery tends to follow the demand equation below, where x is the number of barrels of oil on hand( in millions)
A) how much should be charged for a barrel of oil on hand
B) what quantity x will maximize revenue? what is the maximum revenue
C) what prcies should be charged in oreder to maximize revenue
P=-1/5x+140
Click here to see answer by ankor@dixie-net.com(22740)

Question 935191: A restaurant has one type of lemonade that is 12% sugar and another that is 7% sugar. How many gallons of each type does the restaurant need to make 20 gallons of a lemonade mixture that is 10% sugar?
I think the answer is 8 gallons of 12% lemonade and 12 gallons of 7% lemonade
Click here to see answer by lwsshak3(11628)

Question 935190: A local citizen wants to fence a rectangular community garden. The length of the garden should be at least 110 ft and the distance around should be no more than 380 ft. What system of inequalities would represent the possible dimensions of the garden?
Click here to see answer by Alan3354(69443)

Question 935372: In which quadrant does theta lie if the following statements are true:
cos(theta)< 0 and tan(theta) > 0
Really confused with this one in particular.
Click here to see answer by oscargut(2103)

Question 935374: Last question for this topic.
In which quadrant does theta lie?
tan(theta) < 0 and sin(theta) < 0
Thank you a ton.
Click here to see answer by oscargut(2103)

Question 935417: The coordinates of a point on the unit circle are square root of2/2, -square root of 2/2
If the ternminal side of angle a in standard position passes through the given point find angle a
Click here to see answer by josgarithmetic(39618)

Question 935421: Need help with this question. If you could can you please show your work. Thanks in advanced
Solve the linear system by Gauss-Jordan elimination.
y + z = 2
2x + 3z = 5
x + y + z = 3

Do you think this method has advantages over solving of simultaneous equations by earlier methods? Why or why not?

Click here to see answer by TimothyLamb(4379)

Question 935422: A wheel whose radius measures 16 inches is rotated. If a point on the circumference of the wheel moves through an arc of 12 feet what is the measure in radians of the angle through which a spoke of the wheel travels
Click here to see answer by TimothyLamb(4379)

Question 935415: The terminal side of an angle is standard position intersects the unit circle at the point (.28,-.96)
Find to the nearest degree the smallest positive measure of the angle
Click here to see answer by TimothyLamb(4379)

Question 935451: Write the expression as a function of a positive acute angle whose measure is less than pi/4
Cot 5pi/3
Click here to see answer by stanbon(75887)

Question 935445: Write the expression as a function of a positive acute angle whose measure is less than pi/4
Click here to see answer by Alan3354(69443)

Question 935641: A real estate company purchased a vast area of a lakefront property. The company plans to divide the area into several lots so that customers can purchase a lot and build a home. The length of each lot is represented by the functions below, where w represents the width of each lot. The minimum length of a lot will be 51 feet, and the maximum length of a lot will be 204 feet.
L(w)=3w-15
What is the domain of L(w)?
a) all real numbers between and including 51 and 204
b) all real numbers
c) all real numbers greater than or equal to 5
d) all real numbers between and including 22 and 73
Click here to see answer by MathLover1(20850)

Question 933429: Find the domain of the function

Click here to see answer by Fombitz(32388)

Question 935645: if f(x) = 8^-x , what is the value of f(1/3)

Click here to see answer by Fombitz(32388)

Question 935645: if f(x) = 8^-x , what is the value of f(1/3)

Click here to see answer by josmiceli(19441)

Question 935673: How do I simplify this to a single trig function?
1-sin^2theta.
No one has helped and I'm getting really frustrated.
Click here to see answer by MathLover1(20850)

Question 935673: How do I simplify this to a single trig function?
1-sin^2theta.
No one has helped and I'm getting really frustrated.
Click here to see answer by josmiceli(19441)

Question 933430: Find the domain of the function

Click here to see answer by tommyt3rd(5050)

Question 935730: Which equation represents the function notation for the equation y=5x+4
A.F(4) = -5x
B.F(5) = x+4
C.F(x) = 5x+4
D.F(y) = -5x+4
Click here to see answer by josmiceli(19441)

Question 925811: Which function is an even function?
A. f(x) = 4x
B. f(x) = -x - 2
C. f(x) = 3x^2
D. f(x) = 2x^3 + 2
Click here to see answer by tommyt3rd(5050)

Question 930874: given y=3x-5 find the range if the domain is (-2,0,1,4}
Click here to see answer by tommyt3rd(5050)

Question 933228: If f(x) varies directly with x, and f(x) = 45 when x = 9, find the value of f(x) when x = 3.

Click here to see answer by tommyt3rd(5050)

Question 931249: for the pair of functions, perform the indicated operations
f(x)=4x-6, g(x)=2x-9 find (f-g)(x)
Click here to see answer by tommyt3rd(5050)

Question 921971: if the range of x is 2,what would be range of -3x+50
Click here to see answer by tommyt3rd(5050)

Question 931697: 5x/(X+3)(x-9)
Click here to see answer by tommyt3rd(5050)

Question 922202: f(x)=x^2-15x+56/x^2-4x+12
Click here to see answer by tommyt3rd(5050)

Question 926141: f(x) = √2+ 3√x-2/x-8
Click here to see answer by tommyt3rd(5050)

Question 930631: Which of these equations represent FUNCTIONs check all that apply
Y=x^2 - 3
Y=10X^3
Y=3X
X^2 + y^2=1
Click here to see answer by tommyt3rd(5050)

Question 935757: The width, w, of a rectangular garden is x-2.The area of a garden is x3 - 2x -4. What is an expression for the length of the garden?
Click here to see answer by MathLover1(20850)

Question 935819: jerry wants to purchase some items whose cost function is C=3x +5, where x is the number of items. If Jerry spends between $50 and $80, find the minimum and maximum number of items that he can purchase.
Click here to see answer by TimothyLamb(4379)

Question 935796: Brad threw a baseball off a cliff. The height h, of the ball, in feet, is modeled by the function below, where t represents time, in seconds, after the ball has been thrown.
h(t) = -16t^2 + 48t + 50
What is the height of the baseball after 1 second?

Click here to see answer by josmiceli(19441)

Question 933435: For the given functions f and g, find the following and state the domain of each result
F(x) =5x-6; g(x) =3x+2

Click here to see answer by tommyt3rd(5050)

Question 935851: Suppose f(x) is a linear function and a is a constant. Which of the following is a correct expression for f(x+a)
A.f(x)+f(a)-f(0)
B.f(x)-f(a)+f(0)
C.f(x)f(a)/f(0)
D.f(x)f(0)/f(a)
Click here to see answer by KMST(5328)

Question 935919: Find the minimum or maximum value of the objective function, subject to the constraints graphed in this feasible region
(2,5) (3,3)(4,2)
Z=x+6y+9 find minimum
Click here to see answer by Fombitz(32388)

Question 935797: what is the domain of the function:1/ √ 9-x
Click here to see answer by tommyt3rd(5050)

Question 930049: what is the domain of (x^2-36)/3x ?
Click here to see answer by tommyt3rd(5050)

Question 920164: i am stuck on this problem
f(x)=11x^2-5x+2, find (f(x)-f(a))/(x-a), let a=6
any help would be appreciated
Click here to see answer by tommyt3rd(5050)

Question 920166: i am stuck on this problem
f(x)=-5/(23x+33), and a=-12, find f(x)-f(a)/x-a
any help would be appreciated
Click here to see answer by tommyt3rd(5050)

Question 935972: The function f has a domain of {1,3,5,7} and a range of {2,4,6}.Could f be represented by{(1,2),(3,4),(5,6),(7,2).
Click here to see answer by MathLover1(20850)

Question 936103: Find the domain and range of
g(x) =
Click here to see answer by jim_thompson5910(35256)

Question 921016: f(g(x) is given how to find f(x) and g(x)
Click here to see answer by tommyt3rd(5050)

Question 931020: Please show me step by step how to find the functin values for the following function: f(x)=3x^2 +10x
f(5) and f(a+1)
Click here to see answer by tommyt3rd(5050)

Question 936329: S. Bones is a doctor in Chicago, Illinois and one day sees a patient with a high fever. Dr.Bones takes A blood sample in fines that it contains 1300 flu viruses per cubic millimeter and is increasing. he immediately administers a shot of penicillin to the patient. now, the virus count should continue to go up for a while, then (hopefully!) level off and go back down. after five minutes, the virus count is up to 1875. after five more minutes it is 2400. Assume that the virus count varies quadratically with the number of minutes since the flu shot was given.
a)find the quadratic equation modeling this Virus count per cubic millimeter in terms of the number of minutes since the shot. this can be accomplished by setting up a three variable system and solving for a, b, and c.
b)Dr.Bones realizes that if the count ever reaches 4500, the patient must go to the hospital. will he need to go? explain using the discriminant.
c)according to your model, will the flu be completely cured?
d)what is the domain and range of the quadratic function?
Click here to see answer by stanbon(75887)

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