# 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 43363: The period of vibration P for the pendulum varies directly as a square root of the length L. If the period of vibration of 2 sec. when the length is 16 inches, what is the length when L = 1.5625 inches? Click here to see answer by venugopalramana(3286)

 Question 43437: For the set of data below, find the line of best fit. x -2 -1 0 1 2 y 7 6 3 2 0 a. y = -1.8x + 3.6 b. y = -0.54x + 1.95 c. y = 3.6x - 1.8 d. y = 1.95x - 0.54 e. None of the others Click here to see answer by AnlytcPhil(1278)

 Question 43439: Use the line of best fit for the set of data below to approximate the value of y when x = 4. x -2 -1 0 1 2 y 7 6 3 2 0 a. y = -3.6 b. -0.22 c. 10.8 d. -10.8 e. None of the others Click here to see answer by checkley71(8403)

 Question 43996: Find the difference quotient for f(x) = 2x^2-3x Click here to see answer by stanbon(57407)

 Question 44011: If the intersection of graphs method leads to the same line explain what this means in terms of the solution of the original equation. Click here to see answer by adamchapman(301)

 Question 43945: find an equation of the perpendicular bisector of line segment AB: A(-9,-3), B(1,-7) Click here to see answer by venugopalramana(3286)

 Question 44293: what is the equation of the line that contains the points with (x,y) coordinates (-3,7) and (5,-1)? Click here to see answer by fractalier(2101)

 Question 44415: D=2M M=B-4 B=D-17 What is the value of B? Click here to see answer by checkley71(8403)

 Question 44691: Im sorry, i dont know what kind of algebra this is, but i am just learning that f(x)=y. Now we've started solving problems like f(g(2)) when f(x)=3x and g(x)= x-3. Please help me if you can! Click here to see answer by fractalier(2101)

 Question 45541: In most businesses, increasing prices of their product can have a negative effect on the number of customers of the business. A bus company in a small town has an average number of riders of 800 per day. The bus company charges \$2.25 for a ride. They conducted a survey of their customers and found that they will lose approximately 40 customers perday for each \$.25 increase in fare. Given the description above, graph the function, identify the graph of the function (line, parabola, hyperbola, or exponential), explain your choice, and give the domain and range as shown in the graph you have drawn, and also the domain and range of the entire function excluding unrealistic values. Click here to see answer by Nate(3500)

 Question 45785: it is approximately 480 miles from Los Angeles california to San Francisco, California. Allowing for various road conditions, a driver can average approximately 60 miles per hour. a)Write a linear function that expresses the distance traveled ,d, as a function of time,t Answer: Click here to see answer by checkley71(8403)

 Question 45866: the element europium (EU) exists in nature as two isotopes: (151 EU)with a mass of 150.9196 amu & (153 EU) with a mass of 152.9209 amu. The average mass of EU is 151.96 How do you calculate the relative abundance of the two EU isotopes? X% times 150.9196 (plus) Y% times 152.9209 equals = 151.96. what are the X and Y percentages? And what is the formula to identify the unknowns X and Y? Click here to see answer by stanbon(57407)

 Question 45898: Let A be a 2 x 3 matrix and B be a 2 x 3 matrix. a) Is it possible to add A and B? b) Is it possible to do the multiplication AB? c) Is it possible to do the multiplication BA? Click here to see answer by Nate(3500)

 Question 45897: Does the shaded region of the graph of the system of equations x < 3, x + 7 < 4 include the point (2, 3)? How do you know? Click here to see answer by Nate(3500)

 Question 45896: Does the shaded region of the graph of the system of equations x < 3, x + 7 < 4 include the point (2, 3)? How do you know? Click here to see answer by Nate(3500)

 Question 46890: What are the x and y-intercepts of 3x+2y=21? Click here to see answer by tutorcecilia(2152)

 Question 46994: 1. What is the middle term in the expansion of (x-1/6)6th power? I tried puting both sides of the equation to the 6th power but am nowhere close to the correct answer. Click here to see answer by mathchemprofessor(65)

 Question 46996: 1. When 3+4i / 2+i is expressed in the for a+bi, what is the value of a? I don't understand why the answer is 2. 2. (i+1)(3-i)+(2i-1) I tried multiplying the first two sets and adding the like terms with the third set but I'm not coming up with the correct answer. Click here to see answer by mathchemprofessor(65)

 Question 47159: The volume of a cube is given by V = s3, where s is the length of a side. Find the length of a side of a cube if the Volume is 1000 cm3. Click here to see answer by adamchapman(301)

 Question 47158: A right triangle is a triangle with one angle measuring 90°. In a right triangle, the sides are related by Pythagorean Theorem,c^2=a^2+b^2 , where c is the hypotenuse (the side opposite the 90° angle). Find the hypotenuse when the other 2 sides’ measurements are 6 feet and 8 feet. Click here to see answer by adamchapman(301)
 Question 47158: A right triangle is a triangle with one angle measuring 90°. In a right triangle, the sides are related by Pythagorean Theorem,c^2=a^2+b^2 , where c is the hypotenuse (the side opposite the 90° angle). Find the hypotenuse when the other 2 sides’ measurements are 6 feet and 8 feet. Click here to see answer by Nate(3500)

 Question 47157: For the equation , perform the following: a) Solve for all values of x that satisfies the equation. Click here to see answer by atif.muhammad(135)

 Question 47518: FInd k in the expontential function N(t)=N(o)e, given that N(0)=1 and N(3)=7 Click here to see answer by stanbon(57407)

 Question 47515: Determine the horizontal asymptote of the grahp of B(t) = 1200 divided by 1+34e^-0.125t Click here to see answer by stanbon(57407)

 Question 48025: dear tutors, plz help me find the value of a and b so that x/a + y/b =1 passes through (3,-2) and (9,2). I've already tried answering it but i dont know how.. i solved the value of x and y.. Click here to see answer by longjonsilver(2297)

 Question 48300: describe the inequatlity notation. This equation wants you to use the inequality notation to desribe the set 1)y is nonnegative. 2) y is no more than 25 Click here to see answer by tutorcecilia(2152)

 Question 48531: What is the equation of the line that contains the points with (x,y) coordinates (–3,7) and (5,–1) ? A. y = 3x – 2 B. y = x + 10 C. y = –x + 8 D. y = –x + E. y = –x + 4 Click here to see answer by checkley71(8403)

 Question 48970: Which equation in point-slope form passes through the points (-2,6) and (-3,1)? Click here to see answer by Nate(3500)

 Question 48967: What is the standard form of the equation that passes through (3,0) and (6,-8)? Click here to see answer by checkley71(8403)

 Question 49102: consitstent and inconsistnt systems 1.find the slope and y intercept of each line give the number of solutions x+y=5 y=2x+2 slope 1=0 and b 1=5 slope 2=2 and b 2=2 is that correct or please help i know im doing something wrong can the slope be a -1 for the first or would -x be 0 Click here to see answer by checkley71(8403)

 Question 49874: x 0 1 2 3 4 f(x) 4 2 1 0 1 a) find the missing values f(0)=? and f(?)=0 b) evaluate f(0)-f(3) Click here to see answer by stanbon(57407)

 Question 49873: if you have a piecewise function graph with two open dots on one number, is this a function? how do you state the domain and range? Click here to see answer by stanbon(57407)