Thursday

December 8, 2016
Total # Posts: 3,485

**8th grade**

3.2 * 10^3 means to move the decimal point three places to the right (if the number is negative, move it to the left). 3200

*October 12, 2010*

**math**

3-1/2x-7/2=18 -1/2-1/2x=18 -1/2x=18 1/2 x=-37

*October 12, 2010*

**Probability**

Vika, How many face cards are in a deck? If you don't know, look through a deck of cards or research online.

*October 12, 2010*

**Probability**

The odds against red means the same as the odds for black. There are 7 black beans out of 11 so 7/11.

*October 12, 2010*

**math**

49. You posted this the other day.

*October 11, 2010*

**statistics**

I did explain it, Mary. We already know that you have a 70 and 100. There has to be at least 82's since it's the mode (occurs the most). We can then solve for the missing number. (70+82+82+100+x)/5=76..x will be the last missing number.

*October 11, 2010*

**statistics**

70+82+82+100+x/5=76 (There has to be at least two 82's since it is the mode.) Solve for x, and that's the third unknown.

*October 11, 2010*

**Algebra**

9-9^2>10x-x 9-81>9x -72>9x -8>x or x<-8

*October 11, 2010*

**math**

It's the number cubed..1^3=1, 2^3=8, 3^3=27..now you can finish the pattern.

*October 11, 2010*

**Algebra**

-4-2n+4n>7-4 -4+2n>3 2n>7 n>7/2 or 3.5

*October 11, 2010*

**math**

Also, it has more digits so it has to be greater. Isn't 10 more than 5, and 200 more than 30?

*October 11, 2010*

**Algebra**

.3-.5n+1>=.4 1.3-.5n>=.4 -.5n>=-.9 n>=1.8

*October 11, 2010*

**5th grade math**

Because you would know 20*5=100 and to multiply anything by 100, you add 2 zeroes to the end of it, so it's 6300.

*October 11, 2010*

**math**

7+7, you find another way.

*October 11, 2010*

**math**

Please help me answer this.. Suppose that 2^(x/2)= p 3^(x/3-1)= q [5^(x/2)]/3 = r Express (0.48)^x in terms of p, q and/ or r. this question came from our reviewer.. please and thank you!

*October 11, 2010*

**college math**

Please help me solve this Find the value of k so that the polynomial Q(x)= x^3 - k^2x^2 + k(5x-9)- 12 has a remainder of 1 when divided by x + 2

*October 11, 2010*

**6th grade - EARTH SCIENCE**

What are three interesting facts about the upper mantle of the earth? and 3 interesting facts about the lower mantle of the earth?

*October 11, 2010*

**math**

3526..if it ends in 6, it will be divisible by 6. Can you think of others?

*October 11, 2010*

**algebra I**

3/4x-7=8+-6x Add 7 to both sides. 3/4x=15-6x Add 6x to both sides. 6 3/4x=15 Divide both sides by 6 3/4. 15/ 6 3/4=?

*October 11, 2010*

**PHYSICS ---HELP!**

The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

*October 11, 2010*

**English**

You're welcome. :)

*October 10, 2010*

**English**

You could say 2, 3, and 5.

*October 10, 2010*

**English**

1. They were so happy that they forgot to eat their lunches.

*October 10, 2010*

**maths m**

-16(2)^2+64(2)+6= -16(4)+128+6= -64+128+6=

*October 10, 2010*

**Chem**

Water is added to 25 ml of a .911 M KNO3 solution until the volume of solution is exactly 500ml. What is the concentration of the final solution.

*October 10, 2010*

**math**

Sorry, I didn't finish and I accidentally hit enter. AB AC AD AE BC BD BE CD CE DE (E has already played all of the teams.) That's 10 games.

*October 10, 2010*

**math**

5 teams: ABCDE These teams will play each other: AB AC AD AE BC BD BE CD CE

*October 10, 2010*

**TO MS. SUE**

I actually experimented with the numbers for under 5 minutes, and got it. I'm not going to give you the answer but I will give you a hint that can help you get to the answer quicker. You are going to add all of the numbers, except 2 which you will multiply. Good luck.

*October 10, 2010*

**TO MS. SUE**

What do you need help with?

*October 10, 2010*

**Maths**

Just add 12 hours and get 2100 for the p.m. equivalent.

*October 10, 2010*

**Spanish 1**

You use ellos (them). You use ellas if you were talking about all females. If you are talking about all males or males AND females, you ues ellos. Usted (Ud.) is used as you, formal. Ustedes (Uds.) is used for when you're talking to a group of people and want to be formal...

*October 10, 2010*

**3rd grade**

Its*

*October 10, 2010*

**3rd grade**

It's value is 40.

*October 10, 2010*

**math**

I think it's 120.

*October 10, 2010*

**math**

width is 8, length is 10

*October 10, 2010*

**math**

-2x(4x^2-2x+1) You can use quadratic formula to factor the inside.

*October 10, 2010*

**math**

20(w^2+5w+2) Quadratic formula again..

*October 10, 2010*

**leadership,management and ethics**

No one is going to make the presentation for you. Is there anything specific you need help with?

*October 10, 2010*

**math**

Yup.

*October 10, 2010*

**grammar**

Use she instead of her.

*October 9, 2010*

**Chem**

The sedative Demerol hydrochloride has the formula C15H22ClNO2. How many grams are in 0.020 mol of Demerol hydrochloride? I got 6.640g is this right?

*October 9, 2010*

**Chem**

Calculate the number of grams in 1.86 moles of K. I got 72.54g is this right?

*October 9, 2010*

**math**

This question makes no sense.

*October 9, 2010*

**algebra**

(1/2)/(5/8), change to percent. I think this is how you do it, hopefully someone will correct me if I'm wrong. Just a heads up that I'm not 100% positive on this one.

*October 9, 2010*

**algebra**

28.7-(.05*60)

*October 9, 2010*

**math**

Correct. Good job!

*October 9, 2010*

**English**

2. I would say I spoke with him yesterday is more formal.

*October 9, 2010*

**math**

3/5+4/5=7/5=1 2/5 x/3-y/3=x-y/3 7/a+2/a=9/a

*October 8, 2010*

**4th grade**

I think that's too hard for him considering he's in fourth grade... Ok, so you have three digits ___ ___ ___ They must add up to 5.. Since you know the tens digit is three times the ones digit and all of your digits must be low to add up to 5, the tens digit must be a ...

*October 8, 2010*

**algebra**

x-6=10 Add 6 to both sides. x=16

*October 8, 2010*

**math**

Multiples of 6 that are 2 digits: 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, 78, 84, 90, 96..Now which one has it's tens digit as half of it's ones digit?

*October 8, 2010*

**Math 2nd grade**

49

*October 8, 2010*

**essay**

What do you need help with? Please post a specific question.

*October 8, 2010*

**math**

4.297*80=343.76 In standard notation, the decimal goes after the first digit and then you count how many places you moved the decimal and that's the exponent.. 3.4376 x 10^2

*October 8, 2010*

**English**

Everything looks good. The only thing I would change, if anything, is instead of "word cards", I'd just put "cards" because then you explain the cards.

*October 7, 2010*

**Math**

after 12y+36=36+12y.. the sides are both the same so y can equal anything

*October 7, 2010*

**Math**

4/60=___%

*October 7, 2010*

**Algebra**

4(x-2)=7(1+2x) 4x-8=7+14x Subtract 4x from both sides. -8=7+10x Subtract 7 from both sides. -15=10x Divide both sides by 10. -15/10=x Now reduce.

*October 7, 2010*

**physics**

Hi I have some graph problems I need help on. Sketch a graph of velocity vs. time. A cart is moving to the right on a horizontal surface while a constant net force of 3 newtons acts on it to the left. the force acting on the cart stops after a short period of time. At this ...

*October 7, 2010*

**physics**

ok so that means numbers 1 and 2 would be impossible, and I got for 4 that it could be possible if the object is getting heavier to pull. But for 3 I'm not sure. Thanks

*October 7, 2010*

**physics**

Hi I need help to figure out if these situations are possible or impossible thank you. constant velocity, non-zero net force constant speed, non-zero net force velocity to the left, net force to the right decreasing velocity, increasing magnitude of net force

*October 7, 2010*

**5th grade**

Didn't I solve one similar to this earlier for you? Try this one. If you maximum is 18, you know your minimum has to be 18-13=___. Then put the median in the middle. Make sure you have more 7's than any other number. Then fill in random numbers.

*October 7, 2010*

**math**

331+193 This depends on whether you're rounding to the nearest 10 or 100. If rounding to the nearest 10, 331 rounds to 330 and 193 rounds to 190, so then you'd do 330+190. If rounding to the nearest 100, 330 rounds to 300 and 190 rounds to 200, so then you'd do 300...

*October 7, 2010*

**Physics**

I have this problem about drawing graphs. For the following 6 situations, sketch a graph of velocity vs. time. A cart is moving to the right on a horizontal surface while a constant net force of 3 newtons acts on it to the left> The force acting on the cart stops after a ...

*October 7, 2010*

**Science**

if a piece of copper has a mass of 20g and a volume of 10mL giving a density of 2g/mL, what happens to the density when the piece of copper is cut in half?

*October 7, 2010*

**math 8th grade**

-r-10r=-11r (because -1-10=-11) n-4-9=n-13 (-4-9=-13) -4+7(1-3m)=-4+7-21m=3-21m

*October 7, 2010*

**8th grade**

The square would have to have each side 2y.

*October 7, 2010*

**5th grade math**

2 2 3 4 4 5 5 6 6 6 7 8 First fill in the max. You know it has to be 8. The range of 6 tells you the min has to be 2 (8-6=2). You can then fill that in. The median has to be 5 so 2 5's in the middle spot will ensure that it's 5. The mode has to be 6, so we need at ...

*October 6, 2010*

**Math 2nd grade **

A number cannot have greater than 7 tens and less than 8 tens. There is no number between 7 and 8.

*October 6, 2010*

**Intermediate Algebra (Math)**

You are good up until here.. -1.50x + 400 = 370 (this is correct) Then when you subtract 400 from both sides you get -1.50x=-30 Divide both sides by -1.5 x=20 lbs of pistachios, and 30 lbs of almonds

*October 6, 2010*

**Intermediate Algebra(Math)**

Your first row should be: 6.5x + 8(50-x) = 7.4(50)

*October 6, 2010*

**math 5th grade**

17a^2=2209 Divide 2209 by 17. Then take the square root of that number.

*October 6, 2010*

**algebra**

2, 6, 6, 10

*October 6, 2010*

**math**

The 7th square number is 49, so it has to be bigger than that.

*October 6, 2010*

**math**

It's bigger than 49, and it must be a multiple of 10 (since it doesn't end in a 5)..so your choices are 50, 60, 70, 80, 90, etc..Now check your other conditions and find your number.

*October 6, 2010*

**algebra**

10+5y=77 Subtract 10 from both sides. 5y=67 Divide both sides by 5. y=67/5

*October 6, 2010*

**Algebra-please check**

Correct. You could actually check these problems yourself by plugging in your answers.

*October 6, 2010*

**math**

There should be more information..if not, what are the directions?

*October 6, 2010*

**math**

Boil it?

*October 6, 2010*

**analogies**

There's 100 cents in a dollar, there's 100 ______ in a meter.

*October 6, 2010*

**math**

5x+5=30

*October 6, 2010*

**English**

Yes, they are correct.

*October 6, 2010*

**Algebra1**

8+n=1 Subtract 8 from both sides. n=-7

*October 6, 2010*

**algebra**

y+ab

*October 6, 2010*

**Algebra**

2x^2-3x-20=0 Use the quadratic formula.

*October 6, 2010*

**math.7th gradee.**

Parenthesis means to do that operation first. The order of parenthesis changes the problem. Did you learn order of operations? PEMDAS. Look at the difference between these problems. (4+3)*2=7*2=14 4+(3*2)=4+6=10

*October 5, 2010*

**algebra**

False. The 3 is multiplied by 2 to get 6, and the 4 is multiplied by 3 to get 12. In order for the statement to be true, they would both have to be multiplied by the same number. 3/4=6/8=9/12

*October 5, 2010*

**3rd grade**

You need to add 2 digits plus 2 digits of the lowest numbers. 12 + 34 = ?

*October 5, 2010*

**Math**

4 x 6 = 24, Laura. Sorry Lola, I can't figure it out either.

*October 5, 2010*

**Algebra**

9m+2m-8=5(m-2) 11m-8=5m-10 Subtract 5m from both sides. 6m-8=-10 Add 8 to both sides. 6m=-2 Divide both sides by 6 and reduce. m=-1/3

*October 5, 2010*

**8th grade**

Did you mean 3m=8? Divide both sides by 3 and get m=8/3.

*October 5, 2010*

**algebra) **

All you did was move around the paranthesis, so that's the associative property.

*October 5, 2010*

**math**

x+2y=10 3x+2y=18 Multiply the first equation by -1 to cancel the y's: -x-2y=-10 3x+2y=18 Now add the rows 2x=8 x=? Now plug that back into either original equation to solve for y.

*October 5, 2010*

**math**

(16+____) +(14-7)=18+22 16+____+7=40 23+____=40 ____=?

*October 5, 2010*

**math question. **

Yes.

*October 5, 2010*

**math**

-2x(-6)=12x

*October 5, 2010*

**english**

What elements? You forgot to list them.

*October 5, 2010*

**5th grade**

Round: 200/5=?

*October 5, 2010*