# 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 453993: Find the values of a and b that make f continuous everywhere. f (x)= { x2−4x−2 if x<2 ax2−bx+3 if 2≤x<3 2x−a+b if x≥3 } I dont understand how i would solve this. Please help. Thank you. :) Click here to see answer by stanbon(57347)

 Question 455735: If V={v1,v2,...,vk} is linearly independent, and w is not element of V. Then show that {v1+w,v2+w,...,vk+w} is linearly independent Click here to see answer by robertb(4012)

 Question 455730: Let v1 and v2 be non zero vectors in a vector space V. Show that the following statements are equivalent. a) v1 is not in Rv2=span{v2} b)Rv1 doesn't equals Rv2 Click here to see answer by robertb(4012)

 Question 455953: is -4x to the 2nd+2 linear or not Click here to see answer by solver91311(16885)

 Question 456831: In 1995, the life expectancy of males in a certain country was 73.8 years. In 2001, it was 77.1 years. Let E represent the life expectancy in year t and let t represent the number of years since 1995. The linear function E(t) thats fits the data is E(t)= Click here to see answer by stanbon(57347)

 Question 456888: Emergency Question I need help ? one day the temperature dropped from 2 degrees to -9F How many degrees did it drop?____ Click here to see answer by edjones(7569)

 Question 457317: okay here's my question: find the indicated value of each given function. g(x) = -3x (a) g( -3) (b) g(O) (c) g(3) Click here to see answer by MathLover1(6632)

 Question 457468: Determine whether the point (1, 7) is a solution of the system 2x + 6y = 50 10x + 0y = 10 by substituting the point into each equation Click here to see answer by rfer(12660)
 Question 457468: Determine whether the point (1, 7) is a solution of the system 2x + 6y = 50 10x + 0y = 10 by substituting the point into each equation Click here to see answer by richard1234(5390)

 Question 457957: solve for x square root of(2x+3) + square root of (x-6)=0 i'm so lost Click here to see answer by mananth(12270)

 Question 459623: The coordinates of the midpoint of a segment are (3,-2).One of the endpoints was coordinates (10,-8).What are the coordinates of the other endpoints? Click here to see answer by mananth(12270)

 Question 459627: the endpoint of segment AB are A(-1,-5)and B (9,11) . Find the coordinates of the point 7/8 of the way from A to B Click here to see answer by stanbon(57347)

 Question 460760: Show that if s=(v1,v2,v3) is a linearly dependent set of vectors in a vector space V, and v4 is any vector in V that is not in S, then {v1,v2,v3,v4} is also linearly dependent Click here to see answer by robertb(4012)

 Question 461139: what is the substitution method of x+3y=3 2x-4y=6 Click here to see answer by mananth(12270)

 Question 461940: How do you solve a problem that has a divided variable as a base of a logarithm? My problem is Loga(x)/Log a/b(x) Click here to see answer by AnlytcPhil(1277)

 Question 462529: The graph a quadratic function "f" that has a minimum at the point (1,1). If f(b)= f(3), what could be a value of "b"? Click here to see answer by asuar010(324)

 Question 462531: Let the function "f" be defined by f(x)= x + 1. If 2f(p)=20, what is the value of f(3p)? Click here to see answer by math-vortex(472)

 Question 462831: the endpoint of segment AB are A(1,-5)and B (9,11) . Find the coordinates of the point 7/8 of the way from A to B Click here to see answer by richard1234(5390)

 Question 462526: ABCD is a rectangle with an area of 4. Point A and C lie on the graph of y=px^3, where p is a constant. What is the value of p? Click here to see answer by richard1234(5390)

 Question 463705: Solve the equation: 8x^2 + 5x - 4 = 2x^2 - 8x +1 First I subtracted to get 0 on one side of the equation 6x^2 + 13x -5 =0 I couldn't factor that to solve the problem. What do I do? Click here to see answer by algebrahouse.com(1079)

 Question 463707: A magazine has a circulation of 140 thousand per month when they charge \$2.50 for a magazine. For each \$0.10 increase in price, 5 thousand sales are lost. How much should be charged per magazine to maximize revenue? Click here to see answer by robertb(4012)

 Question 464437: The temperature T, in degrees Fahrenheit, of a cold potato placed is a hot oven is given by T = f(t), where t is the time in minutes since the potato was put in the oven. 1. What is the practical meaning of the symbolic statement, f(20) = 100? 2. Discuss the practical meaning of the statement f -1(4) = 10 (use units in your sentence.) Click here to see answer by stanbon(57347)

 Question 464407: solve for x 24 - (x^2/20) = 16 I started by multiplying both sides of the equation by 20 480 - x^2 = 320 x^2 = 160 x=4 rad 10 Is that correct? Click here to see answer by richard1234(5390)

 Question 464597: the average of the test scores of a class of p students is 70, and the average of the test scores of a class of n is 92. When the scores of both classes are combined, the average is 86. What is the value of p/n? Click here to see answer by jorel1380(2518)

 Question 464611: If the length plus the width of a rectangle ABCD is 8. What is the length of the diagonal AC? Click here to see answer by Alan3354(30993)

 Question 464733: Let the function "f" be defined by f(x)= x^2+18. If "m" is a positive number such that f(2m)= 2f(m), what is the value of m? The answer is 3, but I do not know how to get this answer. Can you help? Click here to see answer by jorel1380(2518)

 Question 464737: A two digit number is obtained by either multiplying the sum of the digits by 8 and adding 1, or by multiplying the difference of the digits by 13 and adding 2. Find the number Click here to see answer by robertb(4012)

 Question 464898: determine, without graphing, whether the given quadratic function has a maximum value or a minimum value and then find the value. f(x) = 2x^2+12X Click here to see answer by solver91311(16885)

 Question 465029: how much lowfat milk (1%) fat and how much whole milk (4% fat) should be mmixed to make 5 gallon of reduced fat milk (2%) Click here to see answer by josmiceli(9678)
 Question 465029: how much lowfat milk (1%) fat and how much whole milk (4% fat) should be mmixed to make 5 gallon of reduced fat milk (2%) Click here to see answer by robertb(4012)

 Question 464979: In rectangle ABCD, point E is the midpoint of the line segment BC. If the area of the quadrilateral ABED is 2/3, what is the area of rectangle ABCD? The answer is 8/9, but I do not know how to get that answer. Can you help? Click here to see answer by robertb(4012)