Tutors Answer Your Questions about Linear Algebra (FREE)
Question 739876: I need to find the answer to and show the steps of these two equations but I have no clue what to do or where to start.It's part of a project which is a big portion of my grade, any help would be great.
The equations are:
133(b)+6(c)=1000
2.07(b)+0.2(c)=8
Click here to see answer by jim_thompson5910(35256)  |
Question 739884: I need to find the answer to and show the steps of these two equations but I have no clue what to do.It's part of a project which is a big portion of my grade, any help would be great. The project is i needed to find the milligrams in a collection of broccoli B and corn C 1000 is the calcium needed per day and 8 is the iron per day needed. I need to be able to show both.
The equations are:
133(b)+6(c)=1000
2.07(b)+0.2(c)=8
Click here to see answer by Alan3354(69443)  |
Question 741884: I am trying to solve a lesson example in my algebra 2 textbook. I don't understand the graph they used for the solution. Here is the question:
Gillian is planning a green roof that will cover up to 600 square feet. She will use two types of plants: blue lagoon sedum and raspberry red sedum. Each blue lagoon sedum will cover 1.2 square feet. Each raspberry red sedum will cover 2 square feet. Each plant costs $2.50, and Gillian must spend less than $1000. Write the constraints, and graph the feasible region.
x = # of blue lagoon sedums
y = # of raspberry red sedums
The book uses the equations:
x >= 0
y >= 0
1.2x + 2y <= 600
2.50x + 2.50y <= 1000
I solved 1.2x + 2y <= 600 for y. I got y >= -0.66 + 300.
When I solve 2.50x + 2.50y <= 1000 for y I get x >= y + 400 (by replacing y with -0.66 + 300).
The graph in the book shows 300 as the y intercept and 400 as the x intercept. If they are using y = mx + b format, I don't know if I should have solved 2.50x + 2.50y <= 1000 for y or x. Whether I solve for x or y I still come out with a y intercept of 400. What am I doing wrong?
Click here to see answer by KMST(5328)  |
Question 744266: Can someone please help me with this integral calculus problem?
An oil storage tank ruptures at time t = 0 and oil leaks from the tank at a rate of r(t) = 120^e−0.01(t)liters per minute. How much oil leaks out during the first hour? (Round your answer to the nearest liter.)
Click here to see answer by Alan3354(69443) |
Question 747676: measured in grams and the time in hours. Since population P depends on time t and each input corresponds to exactly one output, we can say that population is a function of time; so P(t) represents the population at time t.
Time (hours), t
Population (grams), P
0
0.15
2.5
0.33
3.5
0.45
4.5
0.58
6
0.65
(a) Find the average rate of change of the population from 0 to 2.5 hours.
(b) Find the average rate of change of the population from 3.5 to 6 hours.
(c) What was happening to the average rate of change as time passes
Click here to see answer by stanbon(75887) |
Question 756848: Fundraising:
The Buck Creek fire department served 250 dinners. A child's plate cost $5.50 and an adult's plate cost $9.00. A total of 1935 was collected. How many of each type of plate was served.
Click here to see answer by sachi(548)  |
Question 757029: 7. In the following equation a, b, and c are constants. In other words, a, b, and c should be treated like numbers. x is the variable. Solve the equation for x. Show each step.
a+bx=c
Okay this is the problem i have been given and im confused how to treat the a,b, and c as numbers. Could you explain how i could treat them as numbers?
Click here to see answer by josgarithmetic(39616) |
Question 756766: 4x - N = 24
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4x - N = 24
I have submitted this in the algebraic solver but it just simplifies, to zero...isn't there a
step-by-step method that utilizes the answer "24" and the coefficient of x = "4", to solve
the equation, and produce, "9" for the variable "x" and 12 equals "N"...
I know that their must be a way of balancing and finding the result, I sense that there may be,
though perhaps there are other (even irrationals) other values that solve/simplify...."6" is the significant
common factor-of the actual values, that is 36, 24 & 12, this allows me to solve the equation in my head...
ok i'm confused. thank you for help if you have the time.
I am using a good algebra book but it doesn't deal with equations, with a term with a coefficient
"4x" and a variable "n" in this case....
4x - N = 24
---------------------
when I put this equation into the algebra simplifier, it gives me back
4x - N - 24 = 0
this doesn't really solve the equation - and it seems like there should be a way
to solve this, given "4x" and the solution value = "24"
sincerely & thanks so much!!!
jas
Click here to see answer by LearnWithMajor(33) |
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