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

Tutors Answer Your Questions about Linear Algebra (FREE)

Question 443958: solve the equation
e^(0.024x)=6
Click here to see answer by poliphob3.14(115)

Question 444323: find the sum of the solutions of the following quadratic equation x2+9x-36
Click here to see answer by MathLover1(20849)

Question 444717: A fossilized leaf contains 70% of its normal amount of carbon 14. How old is the fossil to the nearest year? Use 5600 years as the half life of carbon 14.

Click here to see answer by stanbon(75887)

Question 445381: What are the solutions to
6x+3y+z=19
x-3y+2z=21
17x-2y+3z=86
Click here to see answer by mananth(16946)

Question 446017: Use limits to describe the behavior of f(x)= 2/x^2-1 at values of x not in its domain.
Click here to see answer by MathLover1(20849)

Question 446892: whitch value of x makes this equation true? 9(x-7)^4/3=9
Click here to see answer by stanbon(75887)

Question 447716: y^2=2x
x=y-1/2
I need help solving this problem. This is the farthest I have gotten...
y^2=2(y-1/2)
y^2=2y+1
Click here to see answer by solver91311(24713)

Question 448815: f(x-1) where f(x)=x^2+5x
Click here to see answer by edjones(8007)

Question 449034: How many solutions does a system of linear equations in three variables have?Can systems of linear equations have infinitely many solutions? Under what circumstances could that occur?
Click here to see answer by MathLover1(20849)

Question 449053: Not sure how to work this problem.
(-6)(-9) divided by (5)(4)(-7) minus (2) 3rd power
Here's what I have thus far:
54 divided by -140 minus (-8)
From here I have no idea where to go.
Click here to see answer by ewatrrr(24785)

Question 449750: One day, you are rollerblading on a trail while it is windy. You travel
along the trail, turn around and come back to your starting point. On your way out
on the trail, you are rollerblading against the wind. On your return trip, which is the
same distance, you are rollerblading with the wind. You can only travel 3 miles an
hour against the wind, which is blowing at a constant speed. You travel 8 miles an
hour with the wind. Use the models below to write and solve a system of equations
to find the average speed when there is no wind and the speed of the wind.
Against the wind: Your speed with no wind - Speed of wind = Your speed
With the wind: Your speed with no wind + Speed of wind = Your speed
Click here to see answer by ankor@dixie-net.com(22740)

Question 450256: Subtract 25 from both sides
25=y2+2y+17
Click here to see answer by richard1234(7193)

Question 451450: Solve:
2x + 3y = 12
Click here to see answer by edjones(8007)

Question 451848: I have to write each function in vertex form.
1. y= x^2 + 4x
2. y = 2x^2 + 8x + 3
3. y = -2x^2 -8x
4. y = -x^2 + 4x + 4
5. y = x^2 -4x -4
6. y = x^2 + 5x
Click here to see answer by ewatrrr(24785)

Question 451865: I need help solving equations similar to this one:
36 divided by "p" = 6
36/p=6
I am looking for the step-by-step sequence to solve it so I can explain it to another person.
Thank you.
Mark
Click here to see answer by ankor@dixie-net.com(22740)

Question 451871: I have to write each function in standard form
1. y = (x +4)^2 - 4
2. y = -(2x + 3)^2 + 14
3. y = 2 (3x + 2)^2 - 4
Click here to see answer by robertb(5830)

Question 451930: multiply the following
a. (3x-1)(x-1)
b. (m-5)(m+5)
Click here to see answer by confusedgirl81(14)

Question 452187: Find all solutions of the equation sinθ+1=1 in the interval [0,2π) .

Write your answer in radians in terms of π .
If there is more than one solution, please provide all possible answers.

Click here to see answer by solver91311(24713)

Question 451929: Write the quadratic equation of y = -2 (x + 7)^2 -5 in standard form. Show all work.
Click here to see answer by ankor@dixie-net.com(22740)

Question 452887: Solve for a:
1/f=1/a+1/b
I know the answer is a=bf/b-f
Click here to see answer by htmentor(1343)

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 richard1234(7193)

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(5830)

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(5830)

Question 455953: is -4x to the 2nd+2 linear or not

Click here to see answer by solver91311(24713)

Question 456476: 2x+10=3x+5 what is x=
Click here to see answer by rfer(16322)

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(75887)

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(8007)

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(20849)

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(16322)

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(16946)

Question 458057: Please help me solve this:
-3(3t+9)
Click here to see answer by rfer(16322)

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(16946)

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(75887)

Question 460507: Can you help me solve these equations please? 3/4y=2/3y+5 and 8s-3=5(2s+1)
Click here to see answer by richwmiller(17219)

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(5830)

Question 461139: what is the substitution method of x+3y=3
2x-4y=6
Click here to see answer by mananth(16946)

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(1806)

Question 462182: how to solve b2+b=2

Click here to see answer by kaushik31(2)

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(338)

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(648)

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(7193)

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(7193)

Question 463319: What is linear algebra?
Click here to see answer by robertb(5830)

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