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

Algebra ->  Algebra  -> College  -> Linear Algebra -> Questions on Algebra: Linear Algebra (NOT Linear Equations) answered by real tutors!      Log On

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

 Question 389520: solve each system by graphing! how do i do this? 3x*4y=13 2x+y=5 Click here to see answer by haileytucki(390)

 Question 389521: solve each system of equations how doi do this? x-4y=16 x+2y=4 Click here to see answer by haileytucki(390)

 Question 389675: 3. The linear equation y=0.15x+0.78 represents an estimate of the average cost of gas for year x starting in 1997. The year 1997 would be represented by x = 1, for example, as it is the first year in the study. Similarly, 2005 would be year 9, or x = 9. a) What year would be represented by x = 6? b) What x-value represents the year 2016? c) What is the y-intercept? d) What does the y-intercept represent? e) Assuming this growth trend continues, what will the price of gasoline be in the year 2016? How did you arrive at your answer? Click here to see answer by robertb(4012)

 Question 389679: 1. Suppose you are at the gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation: C(G)=3.12(G) a) What does the number 3.12 represent? b) Find C(2) c) Find C(9) d) If you were to graph C(g), what values would make up an appropriate domain? Range? Explain your reasoning and remember to include ALL appropriate values. Click here to see answer by josmiceli(9676)

 Question 390436: in a class of 32 students the number of males is 2 more than twice the number of females. how many females are in the class? Click here to see answer by rfer(12657)

 Question 390506: How do you solve the linear inequality y>4 and x+4y > or equal to 8? Click here to see answer by edjones(7569)

 Question 391084: I am so confused on linear equations!! how do you do these to problems and graph them?? 6x-3y=-15 2x+y=-3. (-2,1) Click here to see answer by solver91311(16885)

 Question 391297: How would I find the linear factor of 2x^2 - x - 6? My email is angelsgirl24@embarqmail.com Thank you for your help. Click here to see answer by haileytucki(390)

 Question 392342: use the intercepts to graph the equation x+5y=10 Click here to see answer by NancyLam(35)

 Question 392483: You must buy 100 pets and spend \$100. You may buy dogs, cats and mice, and you must buy at least one of each pet. Dogs cost \$15, cats cost \$1 and mice are 25 cents each. How many of each pet will you buy if you spend exactly \$100 and buy exactly 100 pets? Click here to see answer by ankor@dixie-net.com(15650)

 Question 393274: Set up equation for problem and solve 1) An object is thrown up in the air at a velocity of 20 ft/sec. The height of the object t seconds after it is thrown is given by the function h(t)= -16t^(2)+20t . How long will it take for the object to hit the ground? Click here to see answer by stanbon(57342)

 Question 393359: find the standard form of the equation of the line that passes through the points (9,-3) and (-1,-7) Click here to see answer by stanbon(57342)

 Question 393360: find the equation of the line, in slope-intercept form, that contains the points (-7,3) and (-1,7) Click here to see answer by rfer(12657)

 Question 393273: Set up equation for problem and solve The volume of a box with square base and a height of 12 inches is 768 in3. Find the length of one side of the base. Click here to see answer by ankor@dixie-net.com(15650)

 Question 394236: what would be a line that is perpindicular to the line y=3/2x+4 that passes through (1,5)? Click here to see answer by ewatrrr(10682)

 Question 394361: This is a discussion question in my class. I have seen how a few other students have written an answer for a linear function, but I am having trouble with choosing a real life function and actually writing out the process. I am trying to grasp it- need help. Thank you. In a linear function, the rate of change is constant. In a non-linear function, the rate change is not constant. (It may be predictable, or it may not be - but the rate of change is not a constant - a number.) A piecewise function is a function that is described in different pieces over it's domain. Describe either real life situation that could be modeled be either a linear, a non-linear function, or a piecewise function. Explain why the model is linear, non-linear, or piecewise? I need to make sure that I describe what is the input variable and what is the output variable in my model. Click here to see answer by stanbon(57342)

 Question 394310: How do you know when an equation has infinitely many solutions? Click here to see answer by jim_thompson5910(28595)

 Question 394669: what is the equation of the segment with points (5,12) and (-7, 14)? Click here to see answer by ewatrrr(10682)

 Question 394701: The parabola y=x^2-3 intersects the x-axis at two points, P and Q. What is the distance from P to Q? Click here to see answer by ewatrrr(10682)

 Question 395141: x4-3x-4 this is a factoring problem .... its supposed to be x to the fourth , but i could not get the four small and above the x Click here to see answer by Alan3354(30993)

 Question 395158: the length of a rectangle is 3cm. longer than twice the width and the perimeter of the rectangle is 90cm. Set up an equation for the perimeter involving only w Click here to see answer by mananth(12270)

 Question 395162: a temporary agency offers two payment opyions for administrative help: option1: \$25 daily fee plus \$10/hour or option:no \$15/hour Let x= total hours worked 1.) write a mathematical model representing the total temp cost, C, for a four day temporary administrative assistant in terms of x for the following: Option 1: C= Option 2: C= Click here to see answer by mananth(12270)

 Question 395142: i need to find the domain of F(x) = the square root of 5x-2 Click here to see answer by robertb(4012)

 Question 395175: a temporary agency offers two payment options for administrative help: option 1: \$25 daily fee plus \$10/hour or option 2:no daily fee but \$15/hour Let x= total hours worked a.)write a mathematical model representing the total temp cost, C, for a four day temporary administrative assistant in terms of x for the following: Option 1: C= Option 2: C= 1.)how many total hours would the temp need to work in the four day period for the cost option 1 to be less than option 2. Set up an inequality and show your work algebraically using the information in part a. Don't forget about the daily fee in option 1 (its a four day proposition!). Do not assume an 8 hour work day. Any number of hours per day is possible. Click here to see answer by mananth(12270)

 Question 395296: why does the trip with no wind always faster than the trip with wind, even change d and v Click here to see answer by MathLover1(6632)

 Question 395889: What is the vertex of I keep getting (-3/2), (-3/4) but the y intercept is 6, so I don't understand this equation at all. Click here to see answer by richard1234(5390)

 Question 396112: Given A=(3,7),(-1,2): A) Find the slope between the two points. B) Write the equation of the line through the points in general form. C) Sketch the Graph. Click here to see answer by checkley79(3050)

 Question 396798: solve for b: 4b/8b=8-b i'm a parent trying to re-learn algebra to help my kids. Click here to see answer by stanbon(57342)