09/26/16

How do you solve
-2x + y + 4z = 5 X + 3y - z = 2 4x + y -6 z =11
Follows • 4
Expert Answers •3

09/26/16

Linear algebra
Is R7 a subspace of R7?
Follows • 2
Expert Answers •1

09/26/16

what is the resistance of 2400 ft of the same type of wire with a diameter of 0.34 inches?
The resistance, R, of a wire varies directly as its length and inversely as the square of its diameter. If the resistance of a wire 3500 ft long with a diameter of 0.29 inches is 18952 ohms, what... more
Follows • 2
Expert Answers •1

09/26/16

When x=12, y=8. Find x when y=12.
I need this as a proportional relationship.
Follows • 4
Expert Answers •2

09/26/16

give the number of particles for the ion 93 Zr+3
give the number of particles for the ion 93 Zr+3
Follows • 2
Expert Answers •1

09/26/16

Find the solution
The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 125 grams of a radioactive isotope, how much will be... more
Follows • 3
Expert Answers •2

09/26/16

What are some limitations to the Bohr atomic model? Why do biologists use these models considering the limitations.
Please explain what are some limitations to the Bohr atomic model? Why do biologists use these models considering the limitations?
Follows • 2
Expert Answers •1

09/26/16

What is w/9=9-8. What is the w.
please help me out. I don't know how to do this problem. So please help me out with my work. 
Follows • 2
Expert Answers •1

09/26/16

How to solve this limit (without hopital rule)
lim as x tends to positive infty (x+√x)/(x2+x+1) 
Follows • 3
Expert Answers •2

09/26/16

3x^2+x-4=0
Solve for x                                                                                                  
Follows • 3
Expert Answers •3

09/26/16

is it possible for salt crystals like nacl to have positive and negative ions that are not held by an electrostatic attraction
Has this ever been answered? I need to know for a science fair project.
Follows • 2
Expert Answers •1

09/25/16

fill in the blank to make the expression a perfect square: u^(2)+16u+
to make the expression a perfect square, what do you do? How do you know what numbers to use?
Follows • 3
Expert Answers •2

09/25/16

Give an example of f prime being zero but f prime prime not being zero.
The question asks to give an example of a function for which f'(0)=0, but f''(0) doesn't equal zero.   I cant think of one because if f' is zero then wouldn't f'' always be zero as well?
Follows • 3
Expert Answers •2

09/25/16

The left and right page numbers of an open book are two consecutive integers whose sum is 511.Find these page numbers.
i don't know a lot about the question honestly. so whatever answers you have would really help me out here that would be great. 
Follows • 3
Expert Answers •1

09/25/16

"for what value of p does px^2+3x+2+p=0 have exactly one solution"
I can solve for p, but then what. So confused
Follows • 2
Expert Answers •1

09/25/16

Help - struggling with infinite
-2x-3y+2=-6 x+y-2=5 7x+8y-6z=31
Follows • 3
Expert Answers •2

09/25/16

calculate the moles of CL atoms in 0.070 of C2H4Cl2
Very urgent chemistry hw due tomorrow at 11am
Follows • 2
Expert Answers •1

09/25/16

7 is equal to {7}
i don't understand the question
Follows • 3
Expert Answers •2

09/25/16

Can someone help with significant figures in chemistry?
0.0219 x 0.317 = ? Give the answer in correct number of significant figures. ———————————————————
Follows • 2
Expert Answers •1

09/25/16

How do you find the limit algebraically for this problem?
lim     (x-4)/((√x) -2) x→4+
Follows • 3
Expert Answers •2

09/25/16

rate distance and time
Two buses leave a station at the same time and travel in opposite directions. One bus travels 18 /kmh faster than the other. If the two buses are 368kmapart after 2 hours, what is the rate of each... more
Follows • 2
Expert Answers •1

09/25/16

Mr. Swanson bought a package of 10 disposable razors for $6.30. He found that each razor lasted for 1 week. What was the cost per day?
 zskdjfalkjh askdjfhas kdlfj asdf
Follows • 3
Expert Answers •2

09/25/16

Physics Projectile Motion
Question: A landscape architect is planning an artificial waterfall in a city park. Water flowing at 1.75 m/s will leave the end of a horizontal channel at the top of a vertical wall h = 3.35 m... more
Follows • 2
Expert Answers •1

09/25/16

What is the elevation of the rest stop
The hilltop is 130.5 feet above sea level. The valley floor is 46.5 feet below sea level. There is a scenic rest stop exactly halfway between the top of the hill and the valley floor. What is the... more
Follows • 2
Expert Answers •1

09/25/16

determine the slope & y intercept y=-8+3x
determine the slope and y intercept y=-8+3x  
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.