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

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Question 877843: x + 8 = y, y - x = -4 determine if lines are parallel
Click here to see answer by jim_thompson5910(35256)

Question 877896: Given f(x)=x^2+5x+4. FIND THE FOLLOWING f(x+h) can someone solve it?
Click here to see answer by josgarithmetic(39617)

Question 877929: state instructions of the function f(z)=4z/5-z in words
Click here to see answer by Fombitz(32388)

Question 878004: what is the domain of the function y = √(x^2+ 7x+12)?
Click here to see answer by Fombitz(32388)

Question 878190: How can determine which of the functions f(x) = x^2 and g(x) = 2^x, increases faster over their common domain?
Click here to see answer by sofiyac(983)

Question 878192: Suppose the cost function to manufacture shoes is C(x) = 30x + 300,000, where x represents the number of shoe pairs made. Use this information to construct the average cost function, C(x)/x . Explain the behavior of the average cost function as x increases without bound. What type of asymptote does this function have?
Click here to see answer by josmiceli(19441)

Question 878231: what is the domain and range of f(x)=log(x+6)-4
Click here to see answer by lwsshak3(11628)

Question 878282: For the function f:R+ → R where f (x)=x^2 - 4, the range of its inverse function is:
A. R
B. (-4, infinite)
C. R+
D. (0, 2)
E. (-2, 2)

Click here to see answer by Fombitz(32388)

Question 878307: Compare y=x^2, and y=-x^2 by finding minimums/maximums, x-intercepts, and average rates of change over the interval [0,2].
thanks show all work please.
Click here to see answer by ewatrrr(24785)

Question 878362: 3. What are the first four terms of the sequence represented by the expression n(n � 1) � 4? (1 point)
�2, 2, 6, 10
�3, 0, 3, 6
�4, �2, 2, 8
�5, �4, �2, 6
Click here to see answer by Fombitz(32388)

Question 878360: Find the average rates of change over the interval [2,5] for the functions shown. Copy & paste the link to see the Function please,
thank you. Link : > http://prntscr.com/3ns5cm thanks show all work please.
Click here to see answer by Fombitz(32388)

Question 878367: 1. What are the next three terms in the sequence?
�6, 5, 16, 27, � (1 point)
38, 49, 60
37, 47, 57
36, 45, 54
36, 46, 57
please check my answer I think it is c
Click here to see answer by Edwin McCravy(20054)

Question 878392: 16. Which quadratic rule represents the data in the table?
x -1,0,1,2,3
y 6,5,6,9,14 this is what the data looks like
y = �2x� + 5
y = �x� + 5
y = x� � 5
y = x� + 5
I think it is b
Click here to see answer by solver91311(24713)

Question 878406: 7. Suppose you earn $15 for each car you wash. Which function describes the relationship between your total earnings E and the number of cars you wash, c? (1 point)
E(c) = c + 15
E(c) = 15c
c = 15E
E(c) = c � 15
I got a
Click here to see answer by solver91311(24713)

Question 878401: 12. Which function rule represents the data in the table below?
input (x) 1,2,3,4,5
output (y) 9,14,19,24,29 this is what the data looks like
y = 4 + 5x
y = 3 + 6x
y = 5 + 4x
y = 6 + 3x
i think c
Click here to see answer by josgarithmetic(39617)

Question 878390: 15. Which function rule represents the data in the table?
x -3 -2 -1 0 1
y 1 -2 -5 -8 -11 this is how the data looks
y = �3x � 8
y = one over three x � 8
y = one over three x + 8
y = 3x + 8
please check my answer I got c
Click here to see answer by josgarithmetic(39617)

Question 878416: find an equation in function notation for the relation 1 55 2 100 3 145 4 490 5 235 6 280
Click here to see answer by josgarithmetic(39617)

Question 878395: 14. The sale price of shrimp at a local grocery store is $1.15 for the first ounce and $0.95 for each additional ounce. Which function rule shows how the cost of shrimp, y, depends on the number of ounces, x? (1 point)
a)y = 1.15x + 0.95
b)y = (0.95 + 1.15)x
c)y = 0.95x + 1.15
d)y = 0.95(x � 1) + 1.15
I have a for my answer please check
Click here to see answer by richwmiller(17219)

Question 878407: 6. Given the function rule f(x) = x� � 4x + 3, what is the output of f(�3)? (1 point)
24
21
0
�3

I got b
Click here to see answer by solver91311(24713)

Question 878363: 6. Given the function rule f(x) = x� � 4x + 3, what is the output of f(�3)? (1 point)
24
21
0
�3
Click here to see answer by solver91311(24713)

Question 879261: Please help me with this probem!
d(t)=500t+t^2
t in minutes, d(t) in kilometers
Average speed onm the interval 0<=t<=4:

Units:
Click here to see answer by Alan3354(69443)

Question 879288: find the domain of y=4/2x+7

Click here to see answer by jim_thompson5910(35256)

Question 879294: Please tutors could you help me with this probelm ! 19. The number of weeds on a lawn can be written as the function W(d)=25d+60,where d represents the number of days since spring started.
a. Is the rate of change of this function constant? Explain your answer.

Click here to see answer by jim_thompson5910(35256)

Question 879316: ! 19. The number of weeds on a lawn can be written as the function W(d)=25d+60,where d represents the number of days since spring started.C. What are the units For the rate of change! Please help me !
Click here to see answer by josmiceli(19441)

Question 879286: Determine the slope of the tangent to y=1/(1-x) at the point (2,-1) without constructing a table.
Please explain what youre doing since the correspondence workbook I have is not clear at all as to proper steps for solving something like this. No we have not been taught derivatives but I think that is the best way to go about finding the answer to this question. I got the derivative f^1(x)= -x/(1-x)^2 but I dont know if thats correct or not.
Click here to see answer by josgarithmetic(39617)

Question 879531: Please help me tutors!An animal makes a leap into the air. A function for the height h(t). In meters, of the animal above the ground after t secounds is given by
h(t)=-5t^2+12.5t. a. how long was the animal in the air? Show how you determined your answer.
b.What is the animals maximum height? Show how you determined your answer!
Click here to see answer by ewatrrr(24785)

Question 879548: Hey tutors could you please help with this probelm!

Jack kicked a football. The height, h(t) in feet, of the ball t seconds is given by the quadractic function
h(t)=16t^2+64t.
a. After how many secounds does the ball hit the ground? Show how you determined your answer?
b. Does the ball reach its maximum height a t=2 seconds? Show how you determined your answer?

Click here to see answer by Alan3354(69443)

Question 879765: Can I get some help please?
Functions and Relations
If f(x)=3x^2-4x+5 and g(x)=4x-3
How do I find
(fog)(x)
When finding (fog)(x) where ever you see x in the equation of f(x) you will replace the g(x) equation
(fog)(x)= 3(4x-3)^2 -4(4x-3)+5
= 3(16x^2-12x-12x+9)-16x+12+5
= 3(16x^2-24x+9)-16x+17
= 48x^2-72x+27-16x+17
= 48x^2+(-72x-16x)+(27+17)
= 48x^2-88x+44
(fog)(x)= 4(12x^2-22x+11)
and
(gof)(x)
To find (gof)(x)where ever you see x in the g(x) equation you would replace it with the f(x) equation
g(x) = 4(3x^2-4x+5)-3
= 12x^2-16x+20-3
g(x) = 12x^2-16x+17
Thank you!!
Click here to see answer by BigToosie(32)

Question 879677: g(x) = (x^2-x),find g(x^2-x)

Click here to see answer by jim_thompson5910(35256)

Question 880161: Find (fog).. when f(x)=x^2+1 and g(x)=x-4
Click here to see answer by jim_thompson5910(35256)

Question 880499: if g(x)=2x^2 +4x + 2.what is the value of g^-1 (0)
Click here to see answer by josgarithmetic(39617)

Question 880689: f(x)=2(x-3)^2
Click here to see answer by jim_thompson5910(35256)

Question 880937: Write a function rule based on the table below.
x f(x)
0 5
1 8
2 11
Click here to see answer by jim_thompson5910(35256)

Question 880938: Let P(r) represent the total number of pins in r rows. Please help Tutor!
a. complete the table based on the total number of pies.
d. Write a function for P(r). The function can either be explict or recursive.
E. Jack decides that he will have 12 rows of pins. What is the total number of pins that he will need!
Number of rows (r) Total number of pins P(r)2,5,10,17,26,37

1
2
3
4
5
6
Click here to see answer by KMST(5328)

Question 881028: solve by the addition method. check you solution
5x-4y=2
-3x+10y=-5
Click here to see answer by josgarithmetic(39617)

Question 881028: solve by the addition method. check you solution
5x-4y=2
-3x+10y=-5
Click here to see answer by MathTherapy(10551)

Question 881046: Please help me to solve this. The supply function qs=f(p) for a product is quadratic.Three points which lie on the supply function are (30,1500),(40,3600) and (50,6300). (i) determine the equation of the supply function. (ii)define restricted domain of the function. compute and interpret p intercept.
Click here to see answer by Fombitz(32388)

Question 881081: find the domain of variable x
1. y-xy=7
Click here to see answer by Fombitz(32388)

Question 881099: I don't understand how I know the Domain from an equation- like g(x)=2/x-3
Click here to see answer by algebrahouse.com(1659)

Question 881152: Given the functions f(x)=4x-1 g(x)=3-2x^2 h(x)=sq rt (x+5)
Simplify h(g(2k+1)) and state the domain
I have come to sq rt(-8k^2-8k+6), I'm not sure if I should leave it like this, or factor out 2. I need to know the equation and the domain, the domain I would assume wouldnt be the same as the original h(x) domain of x> or equal to -5
Thanks in advance.
Click here to see answer by rothauserc(4718)

Question 881129: F(x) = x2 - 3 and G(x) = 2x + 1
Find Restriction for (F /G)
How would you find the restrictions of this?
And is restrictions simple mean x≠(...)?
Click here to see answer by Fombitz(32388)

Question 881173: Jovanna gives a walking tour of a popular tourist city to one person for $43. To increase her business, she would lower the price by $2 per person for each additional person. Write the cost per person (c) as a function of the number of people (n) on the tour. How much does she make for a tour with 7 people?
A) Write the cost per person c as a function of the number of people n on tour
B) How much does she make for a tour with 7 people?
Click here to see answer by stanbon(75887)

Question 881252: I need help finding the range of f(x)=-sqrt(x+3)
Click here to see answer by josgarithmetic(39617)

Question 881257: is the range of f(x)=2/(x-1)
(-infinity, 0) U (0,infinity)?
Click here to see answer by jim_thompson5910(35256)

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