# Questions on Algebra: Linear Algebra (NOT Linear Equations) answered by real tutors!

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 Algebra: Linear Algebra (NOT Linear Equations) Solvers Lessons Answers archive Quiz In Depth

 Question 750573: 1 curry + 1 tea =£4 2 curries + 2 puddings= £2 1 pudding + 2 teas =£2 what do you have to pay in total for 1 curry, 1 pudding and 1 tea. what does each item costs on its own? Click here to see answer by stanbon(57314)

 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(57314)

 Question 744227: 7x + 5y =77 3x- 4y = -10 Click here to see answer by Chipmonkcheeks(3)

 Question 739221: Determine which term of the sequence 3,5,7 is equal to 27 Click here to see answer by tommyt3rd(528)

 Question 744963: Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. 𝑥2+𝑦2−8𝑥+14𝑦+65=36 Click here to see answer by josgarithmetic(1507)

 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(30993)

 Question 742983: what are the positive numbers less than -1 x < -1 (Positive numbers only) Click here to see answer by davethejackal(28)

 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(1868)

 Question 741036: Find the radius and center of the circles defined by the following equations 1. 9 = (x-2)^2 + (y+4)^2 radius=_____ center= ______,________ 2. 2(x+2)^2 + 2(y-3)^2 = 10 radius=_____ center= ______,________ Click here to see answer by stanbon(57314)

 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(30993)

 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(28593)

 Question 739522: can you kindly explain how 6x=12 can be solved. Thanks, Sohail Click here to see answer by Edwin McCravy(8908)

 Question 737927: graph of the function -2(x - 1)^2 = y + 5? Click here to see answer by lwsshak3(6494)
 Question 737927: graph of the function -2(x - 1)^2 = y + 5? Click here to see answer by MathLover1(6627)

 Question 737787: x^2 + y^2 =25 and 2x -3y =-6 i need to find all real solutions of the nonlinear system of equations Click here to see answer by Susan-math(40)

 Question 736146: A basketball player scored 18 times during one game. He scored a total of 30 points, which consists of 1 point free throws and 2 point baskets. How many one point free throws did he make? How many 2 point baskets did he make? Click here to see answer by lynnlo(4155)

 Question 734240: Felipe jogs for 10 miles and then walks another 10 miles. He jogs 1.5 miles per hour faster than he walks, and the entire distance of 20 miles takes 6.5 hours. Find the rate at which he walks and the rate at which he jogs. I have no idea how to do this! Click here to see answer by ankor@dixie-net.com(15649)

 Question 731518: solve the following system of equation for x and y x + y = 7 + -x -y = 1 Click here to see answer by Alan3354(30993)

 Question 730752: I'm not exactly sure what this category this falls under, but I need to find the vertex form of the following equation: f(x) = x^2 +10x -5 Click here to see answer by lynnlo(4155)

 Question 730047: I hope this is in the right section, if it isn't I apologize. The points (1,-4) and (2,-1) are collinear. The points (3,19) and (5,25) are also collinear. What can you say about the lines that cross these points? I.. really don't even know where to start. Thanks for any help. Click here to see answer by Alan3354(30993)