# 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 465864: Maria used a coupon for 20% off her new camera. If sales tax is 8% and she paid \$190.08 what was the original price of the camera? Click here to see answer by stanbon(57412)

 Question 465928: evaluate f(4) when f(x) = x^2 - 2 when x<= 2 2x-5 when x>= 2 Click here to see answer by robertb(4012)

 Question 466532: 2x-5= -y x+3y= 0 What is x and y? Click here to see answer by stanbon(57412)

 Question 466830: If [n/(n-1)] x [1/n] x [n/(n+1)] = 5/k for positive integers n and k, what is the value of k? the answer is 24, but I do not understand how they got this answer. Can you help? Click here to see answer by stanbon(57412)

 Question 466827: To celebrate a colleague's graduation, the "m" workers in an office agreed to contribute equally to a catered lunch that cost a total of "y" dollars. If "p" of the coworkers fail to contribute, what represents the additional amount, in dollars, that each of the remaining coworkers must contribute to pay for the lunch? The answer is: (py)/ (m(m-p)) Can you please explain how they got this answer? Click here to see answer by ccs2011(207)

 Question 466929: If (x)(y)=7 and x-y=5, then (x^2)y - x(y^2)= The answer is 35, but I do not undestand how they got this answer. Can you help? Click here to see answer by robertb(4012)

 Question 466930: If n and p are integers greater than 1 and if p is a factor of both n+3 and n+10, what is the value of p? The answer is 7, but I do not understand how they got this answer. Can you help? Click here to see answer by robertb(4012)

 Question 467065: What is the range of the graph y = 5 ( 1/4)^x+1 + 2 Click here to see answer by Big Poop(157)

 Question 467134: There are 75 more women than men enrolled in Linden College. If there are "n" men enrolled, then, in terms of "n", what percent of those enrolled are men? The answer is [(100n)/ (2n+75)]% I do not understand how they got this answer. Can you help? Click here to see answer by stanbon(57412)

 Question 467138: The decimal number 5.101001000100001.... What is the total number of 0's between the 98th and 101st 1 in this decimal? The answer is 297, but I do not understand how they got this. Can you help? Click here to see answer by sudhanshu_kmr(1152)

 Question 467229: QR is an arc of a circle with a center P. If the length of the arc is 6pi and the degree of the angle formed at center P is 30 degrees, what is the area of the sector PQR? The answer is 108pi. Please help me understand how they got this answer. Thank you! Click here to see answer by Big Poop(157)

 Question 467255: QR is an arc of a circle with a center P. If the length of the arc is 6pi and the degree of the angle formed at center P is 30 degrees, what is the area of the sector PQR? The answer is 108pi. Please help me understand how they got this answer. Thank you! Click here to see answer by Big Poop(157)

 Question 468514: the tenth digit of a two digit no. is 5 more than the unit digit. what is the number if the sum of two digit is 9. Click here to see answer by rfadrogane(214)

 Question 468584: Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions. x + y = -8 x + y = 5 Click here to see answer by Alan3354(30993)

 Question 468780: The Washington Monument is 555 ft high. How long would it take an object to fall freely from the top? Click here to see answer by Alan3354(30993)

 Question 468996: shipping charges at an online bookstore are \$4 for one book, \$6 for two books and \$7 for three to five books. last week, there were 6400 orders of five or fewer books, and a total shipping charges for these orders was \$33,600. the number of shipments with \$7 charges was 1000 less than the number with \$6 charges. how many shipments were made in each category (one book, two books and three to five books)? Click here to see answer by ccs2011(207)

 Question 470538: In the xy-plane, line "l" passes through the origin and is perpendicular to the line 4x+y=k, where k is a constant. If the two lines intersect at point (t, t+1), what is the value of t? The answer is -4/3, but I am not sure how to get this answer? Please help. Click here to see answer by scott8148(6628)

 Question 470568: The Acme Plumbing Company will send a team of 3 plumbers to work on a certain job. The company has 4 experienced plumbers and 4 trainees. If a team consists of 1 experienced plumber and 2 trainees, how many different such teams are possible? The answer is 24, but I need help understanding how they got this answer. Click here to see answer by jorel1380(2518)

 Question 470687: The function f is defined by f(x)=x^3 - 4x. The function of g is defined by g(x)=f(x+h)+k where h and k are constants. What is the value of hk? Points for y=f(x)are (-1,3), (1,-3) Points for y=g(x) are (2,1), (4,-5) The answer is 6, but I do not understand how they came up with this answer. Please help! Click here to see answer by MathLover1(6646)

 Question 470794: How many integers in the set of all integers from 1 to 100, inclusive, are NOT the square of an integer? The answer is 90, but I am not sure how they came up with this answer. Please help! Click here to see answer by jim_thompson5910(28598)

 Question 470978: h(t)= c-(d-4t)^2; At time t=0, an initial height of 6 feet. Until the ball hit the ground, its height in feet after t seconds was given by the function h (at the beginning of problem), in which c and d are positive constants. If the ball reached its maximum height of 106 feet at time t=2.5, what was the height in feet of the ball at t=1 ? The answer is 70, but I do not understand how they came up with this answer....please help! Click here to see answer by Alan3354(30993)
 Question 470978: h(t)= c-(d-4t)^2; At time t=0, an initial height of 6 feet. Until the ball hit the ground, its height in feet after t seconds was given by the function h (at the beginning of problem), in which c and d are positive constants. If the ball reached its maximum height of 106 feet at time t=2.5, what was the height in feet of the ball at t=1 ? The answer is 70, but I do not understand how they came up with this answer....please help! Click here to see answer by bucky(2189)

 Question 470883: Let "x" be defined as x = x^2 - x for all values of x. If a = a-2, what is the value of "a"? The answer is 3/2, but I do not understand how they got this answer........please help. Click here to see answer by Alan3354(30993)

 Question 471202: Let "x" be defined as "x" = x^2 - x for all values of x. If "a" = "a-2", what is the value of a? Note: the "" symbol means the variable is circled. The answer is 3/2, but I do not understand how to get this answer, please help. Click here to see answer by MathLover1(6646)

 Question 471246: this is my jr year and i'm taking algebra 2 and i was wonder what tpye of calcutor will be need for this class Click here to see answer by richard1234(5390)

 Question 470694: Let x be defined as x= x^2 - x for all values of x. If a = a-2, what is the value of a? The answer is 3/2, but I do not understand how they got the answer. Please help! Click here to see answer by richard1234(5390)

 Question 471468: Examples on how to solve 2 variables in linear equation Click here to see answer by mananth(12270)

 Question 472003: I have the answer for this problem one way and my friend has it another way. X = -8, -6 my friend has x = -6, -4 which one of us is right? Click here to see answer by stanbon(57412)

 Question 472755: . Determine fog and gof given that i. F(x)=3x-4 g(x)=x^3 Click here to see answer by Tatiana_Stebko(1326)

 Question 473013: 1.) 2/3 of what number is 16? 2.) solve for m: 2/3=m/42 3.) solve for z:6=z/5.9 4.) Write the answer to the nearest tenth. 449/0.42Fill in the blank with so that the resulting inequality is true. 7/16_________0.875 Click here to see answer by rfer(12677)