Amelie

I'm having a hard time factoring polynomials, especially 3rd degree. -x^3+2x^2+4x-8 -x^3-5x^2+20x+12 I don't know how to begin. I thought long division, but what would I divide by?

17 years ago

If det(A)=-7 A= | a b c | | d e f | | g h i | Find det(2A^-1), det((2A)^-1). Find | a g d | | b h e | | c i f |

17 years ago

A certain pizza restaurant offers three different sizes of pizza and eight different toppings. How many distinct pizzas having two different toppings can be made? ====================================== I think part of the answer to the question is (8)\ (2...

17 years ago

In a certain election, the incumbent Republican will run against the Democratic nominee. There are three Democratic candidates, D1, D2 and D3, whose chances of gaining the Democratic nomination are .50, .35 and .15, respectively. Here are the chances that...

17 years ago

A fair coin is flipped three times. You win $5 every time the outcome is heads. Let the random variable X represent the total number of dollars you win. (a) List the sample space. (b) Determine the probability function of X. ====================== Answer:...

17 years ago

two construction contracts are to be randomly assigned to one or more of 3 firms- I,II,III. A firm may receive more than one contract. if each contract has a potential profit of 90,000 dollars. find the expected potential profit for firm I. then find the...

17 years ago

My main problem is deciding with discrete distribution to use: BERNOULLI, BINOMIAL, DISCRETE UNIFORM, GEOMETRIC NEGATIVE BINOMIAL, OR POISSON. Every time I choose one, it's the wrong one. Is there some way I can easily find out which one to use. Because w...

17 years ago

I need to rationalize the denominator of 2/3 square root of five, (three being the index). My book suggests you should multiply this by 3 square root of 5^2 over 3 square root of 5^2. I thought the numbers that you rationalize the original with should be...

16 years ago

I'm trying to solve the problem: 6y-bracket 3y-(y+7)bracket. I got an answer of 4y-7 multiple times. However, my book said the answer is 4y+7. I do not see how the 7 can be positive. I distributed the negative, so therefore, the seven should be negative....

16 years ago

On my quiz for (3x+2)^2, I wrote the answer as 21x=4. My teacher gave me a minus one, which meant it was half wrong. What is wrong about my answer? Thanks

16 years ago

I am unsure how to factor x^3-8. Could you please explain?

16 years ago

I had to factor 5x^3-10x^2+43x-6. I got 5x(x^2+-2x)+3(x-2). My teacher said this was half right. What did I do wrong then? Thank you!!

16 years ago

I am trying to simplify 24a^2/b^4 (the entire expression has a radical sign around it). I got 4a times the radical of 6a/b^4. However, my teacher said this isn't correct on my quiz. Why, and what is the right answer? Thanks!!!

16 years ago

One mole of tungsten has a mass of 184 grams, and its density is 19.3 grams per cubic centimeter, so the center-to-center distance between atoms is 2.51×10-10 m. You have a long thin bar of tungsten, 2.2 m long, with a square cross-section 0.16 cm on a si...

14 years ago

A hanging wire made out of titanium with diameter 0.080 cm is initially 2.3 m long. When a 78 kg mass is hung from it, the wire stretches an amount 2.89 cm. A mole of titanium has a mass of 47.9 grams, and its density is 4.51 g/cm3. Based on these experim...

14 years ago

You observe someone pulling a block of mass 48 kg across a low-friction surface. While they pull a distance of 3.0 m in the direction of motion, the speed of the block changes from 4.9 m/s to 7.7 m/s. Calculate the magnitude of the force exerted by the pe...

14 years ago

Find the minimum stopping distance for a car moving at 108km/h if the coefficient of static friction between the tires and road is 0.9 I really don't understand pls helppp

9 years ago

8] Find the minimum stopping distance for a car moving at 108km/h if the coefficient of static friction between the tires and road is a) 0.9

9 years ago

What does the slope of a Kinetic Energy V.S Gravitational Potential Energy graph represent? I found 1 but I don't know what it represents I know that PE+KE=constant

9 years ago

I am not asking for an answer, I´m just requiring some help to understand the following problem: How are graphs of the functions obtained from the graph of f? a. y= -f(x) b. y= 2f (x) -1 c. y= f(x-3) +2

9 years ago

I need some help on doing the process of the following problem: A body falls freely from rest and half of his fall is done in the last second. Calculate the total time of the fall. I know that the time on the first path is t-1. Also that I can equalize di...

9 years ago

The height of a leaf above the ground after it falls from a tree is given by the formula s(t)=-3.8t^2+47.3, where time is given in seconds and height is given in feet. When would the leaf land on the top of the person's head if the person was seated on th...

3 years ago

oh, now wasn't that simple, thank you reiny

17 years ago

posted twice, sorry

17 years ago

thank you drwls

17 years ago

thank you damon

17 years ago

I'm sorry I mistyped my answer. I said it was 21x+4. What is wrong with THIS answer? Thanks.

16 years ago

Yes, it is supposed to be a three, not a fourty three.

16 years ago

x^3+-448x?

16 years ago

Dalton's Law states that the total pressure of a system is equal to the partial pressure of all the mixed gases. The equation looks like this. Ptotal = P1 + P2 + P3 + ... Assume that the temperature and volume is constant. When going to high altitudes, th...

15 years ago

1. Get the inverse of each side in cos(θ)=-((3)/(7)). Cos^-1 (3/7) = theta. 2. From trig identities, we know sin2θ = 2sinθcosθ Substitute that in for sin2θ and just solve since you figured out θ in part 1 and you were given what cosθ equals, which is 3/7.

14 years ago

Oh, I forgot to add the negative sign with 3/7.

14 years ago

Also, I know the rest energies would cancel out.

14 years ago

Forget it I already obtained the answer. Is 3.41 seconds, right?

9 years ago

Unit 3 Lesson 8 :) Quiz The Ninth and Tenth Amendments - 1. D 2. C 3. B 4. C 5. B 6. B 7 Do on your own in your own words ! * and i changed my name *

4 years ago