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Tutors Answer Your Questions about Expressions-with-variables (FREE)
Question 90614: A manufacturer has determined that the revenue received from selling x items of a product is given by R(x) = -0.3x2 + 200x and the cost to produce x items of the product is given by C(x) = 80x + 9400. Assuming that all of the products produced can be sold, how many should be produced to maximize the profit? (Hint: profit = revenue - cost)
I have such a hard time with word problems. I reall appreciate the help
Click here to see answer by scott8148(3382)   |
Question 91698: write the expression for each quantity
1. the value in cents of 5 quarters
2. the value in cents of q quarters
3.the number of months in 7 years
4. the number of monthes in y years
5. the number of gallons in 21 quarts
6.the number of gallons in q quarts ?
i dont get it ? plz help
Click here to see answer by scott8148(3382) |
Question 92213: A.) Linear Growth A town has a fixed increase in population growth number of population increase each year. population 1897. Find the growth rates for the following
I don't get this at all?
Year (t) Population (P)
t = 0 Po = 1897
(2010)
t = 1
(2011)
t = 2
(2012)
t = 3
(2013)
t = 6
(2016)
B.) Find a linear equation in the form P = mt + b (y = mx + b), which gives the population, P, t years from 2010.
Click here to see answer by bucky(1732)  |
Question 92748: This might be a stupid question but, it's bothering me so here it is: Evaluate the expression for the given value of x :  x=-1
I'm not sure if I'm supposed to put the -1 in parentheses because if I do I get a different answer.
Look:  or --1^2+-1-1=-1
Which is it?
Click here to see answer by bucky(1732) |
Question 92918: Hey this is Debbie and I am having trouble understanding this.
For these linear functions complete the table of values by substitution.
b=a+3
a 0 1 2 3 4 5 10
b
I am having trouble working how to do substitution because I forgot how to do it.Must help appreciated.
Click here to see answer by scott8148(3382) |
Question 93314: Can you please help me with this problem? Solve for x. x+2y= -1
3x-4y= 27
I think I am supposed to solve for the y variable in one problem, then plug it in for the next one. I'm not sure though. Thank you in advance!!!
Click here to see answer by checkley75(3666) |
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