Saturday

January 21, 2017
Total # Posts: 3,491

**Math**

12:15

*January 17, 2011*

**alegebra 2**

What are the directions...

*January 17, 2011*

**Math**

In a mathematics olympiad there are 20 finalists. In how many ways can three equal prizes be awarded, assuming that two prizes cannot be given to one finalist? In how many ways can a first, second and a third place be awarded? (I understand that Permutations and Combinations ...

*January 17, 2011*

**physics**

A model rocket leaves the ground, heading straight up at 47 m/s. (a) What is its maximum altitude? m What are its speed and altitude at each of the following times? (b) 1 s m/s m (c) 4 s m/s m (d) 8 s m/s m

*January 16, 2011*

**chem**

the gap between two brain cells is 0.0020 nm. how many meters is this

*January 15, 2011*

**math**

13c+7d=99.8 12c+7d=84.11 Multiply the 2nd equation by -1 13c+7d=99.8 -12c-7d=-84.11 c= Plug that back into either original equation to solve for d.

*January 15, 2011*

**English**

1 is kind of awkward. I would change come to take.

*January 14, 2011*

**pre algebra**

the midpoints of each side of triangle NOT are connected to make a smaller triangle inside triangle NOT. If the area of triangle NOT is 16 in squared, what is the area of the smaller triangle?

*January 13, 2011*

**algebra**

what is the height of a solid with a volume of 120m3 and a base area of 30 m2

*January 12, 2011*

**English**

How do I write an outline for a paper?

*January 12, 2011*

**Spanish**

You have to post it first.

*January 12, 2011*

**math**

300 * 3 = 900

*January 11, 2011*

**Math**

They were different size pizzas..

*January 10, 2011*

**math geometry ITT**

All of the angles in a triangle total 180, so 180-40=140, 140/2=70

*January 10, 2011*

**Math**

2,300-2,500=?

*January 9, 2011*

**7th Grade**

Z+5/7=3 z=3-5/7 z=?

*January 9, 2011*

**com170**

Also: definitely, not defiantly lose, not loose

*January 9, 2011*

**spanish**

If you are struggling, maybe write it in English first, and then work on translating it to Spanish. You don't need "examples" of me telling you what I did last week. Just be sure that you understand when you need to use the preterite. If not, re-read that section...

*January 8, 2011*

**english**

Grammar mistakes: insure should be ensure (2 x), 4. I have learned that (not this) in life...at a quick glance the verb tenses appear to be correct, but they were not thorougly checked.

*January 8, 2011*

**algebra**

P + q for p = 32 and q = 18 5 P + q= ? 5 Should this say 5p+q? Not sure what the random 5 is there for. Either way, just plug in the numbers. If it is 5p+q, it's 5(32)+18. Find domain of the function g (x) = 10 4-7x, 4-7(10)

*January 7, 2011*

**errors**

-0.7x<-35 Divide both sides by -0.7. When you do this the sign flips. x>50

*January 7, 2011*

**accounting**

You have been asked to speak at a career fair for high school students in your home town. Specifically, you are making a presentation about your role as an accountant. Describe for the students the primary objectives of accounting. Explain the basic terminology of the ...

*January 7, 2011*

**algebra**

The slope is -3 and the y intercept is -5.

*January 7, 2011*

**Algebra**

Donna, almost all of your posts contain an equation or something similiar without a question. You have to tell us what the directions are. We aren't mind readers.

*January 7, 2011*

**math**

You're going to need to use a ruler. We can't help you online with this..

*January 6, 2011*

**Math**

8x+2y+11=0 2y=-8x-11 y=-8/2x-11/2

*January 6, 2011*

**Math 208**

x+3y=2 -x+y=1 so y=x+1, substitute that into the 1st x+3(x+1)=2 x+3x+3=2 4x+3=2 4x=-1 x=-1/4 Substitute that into either of the original equations to solve for y.

*January 6, 2011*

**precal**

Why is there no corresponding point on tan^-1(x) for the (135,-1) on the graph tan(x). Thanks!

*January 6, 2011*

**7th grade math**

6+x=2x-14 Letters on one side, numbers on the other. Subtract x from both sides. 6=x-14 Add 14 to both sides. 20=x

*January 6, 2011*

**math**

The lines mean absolute value. It means to make whatever is inside positive. |2|=2 |-2|=2 -|2|-2 -|-2|=-2 Get it? Always do the absolute value part first.

*January 6, 2011*

**math**

Jess is right, it's add. 5 * 3 = 15. 5 * 2 = 10 and 5 * 1 = 5, 10 + 5 = 15.

*January 6, 2011*

**math**

(3.5x10^-3)(4.2x10^7)

*January 5, 2011*

**math**

6(n+2)-(4-n)

*January 5, 2011*

**english**

It's a personification, because it gives the lake a human quality (being wrinkled).

*January 4, 2011*

**math**

No solution.

*January 4, 2011*

**pre algebra**

All of the whole numbers between -4 and 6, not including them since it's not <=. -3, -2, -1, 0, 1, 2, 3, 4, 5.

*January 4, 2011*

**math**

I'll do the first one. x+8>15 You want to get the letters on one side and numbers on the other. Subtract 8 from both sides. x>7

*January 4, 2011*

**algebra 2**

2x+5y=10 x-3y=-6 Multiply the 2nd equation by -2 so that the x's cancel. 2x+5y=10 -2x+6y=12 Add the lines together. 11y=22 Solve for y, replace that in either original equation to solve for x.

*January 4, 2011*

**MATH PRE-ALGEBRA**

It should be an open dot because it's an inequality. It would be a closed dot if it was an equality, such as x=3.

*January 3, 2011*

**Algebra 1**

It's not a solution. It would have to say x>=-4 for that to be true. -4 is not more than -4.

*January 3, 2011*

**algebra**

half

*January 3, 2011*

**math**

Perimeter means to add the sides. Pool A: 10+2+10+2 Pool B: 7+7+7+7 Which is more?

*January 3, 2011*

**algebra**

2x+7+14=2x+21

*January 2, 2011*

**algebra**

9(2)-4.5=?

*January 2, 2011*

**Algebra**

.5x+7<=1.3x-8 7<=.8x-8 15<=.8x 18.75<=x or x>=18.75

*January 2, 2011*

**Math**

Should that say x^2+8x+15? I think it should..

*January 2, 2011*

**math**

what is the inverse function of f(x)=3/x-4

*January 2, 2011*

**integrated algebra**

8y-11<5 or 13<4y-7 8y<16 or 20<4y y<2 or 5<y, y>5 so y<2 or y>5

*January 2, 2011*

**algebra**

never

*January 2, 2011*

**geometry**

All I can suggest to do is draw it. I got (-3,-2)..im sure it's something like that.

*January 2, 2011*

**eng 20 F**

Try searching No Fear, Shakespeare online. It's very helpful.

*January 2, 2011*

**Social Studies**

Louisiana

*January 2, 2011*

**algebra 2**

(-3)^2-6(-3)+3

*January 1, 2011*

**math**

Just reduce each..15/30=1/2 and so on

*December 31, 2010*

**Geometry**

Since it's an equilateral triangle, AB=BC. 3x=2x+12, solve for x.

*December 29, 2010*

**Math**

You just divide it. 19/3=6 remainder 1, and the denominator stays 3.

*December 29, 2010*

**pharmacy tech**

To find out if a drug causes nausea, you would look in this section of the drug monograph

*December 29, 2010*

**math**

i/o 1 5 +4 2 8 +6 4 14 +10 8 ? +16 8+16=? (Input is doubling.)

*December 28, 2010*

**algebra**

3/4=60/x, cross multiply and solve

*December 27, 2010*

**Algebra**

a^2+b^2=c^2 The two sides are equal and you know c, so.. 2a^2=50 Solve for a.

*December 27, 2010*

**math**

It is B. For a great website on this, see h t t p : / / w w w . r e g e n t s p r e p . o r g / R e g e n t s / m a t h / a l g t r i g / A T E 3 / d i s c r i m i n a n t . h t m (without the spaces, obviously)

*December 27, 2010*

**'Twas the Night Before . . .**

Thanks for sharing! Did anyone notice it says Donder instead of Donner? lol.

*December 24, 2010*

**distributive property**

What's 5 *6x? What's 5 * 9? Remember to separate the two terms with the plus sign.

*December 23, 2010*

**math**

Just divide it out. 8/11=.727272 etc = .73

*December 21, 2010*

**5th grade math**

Inverse operations are like "opposites", what undoes the operation. Multiplication and division are inverses, as are addition and subtraction. For example, if you have 4x+2=10, you have to use the inverse of addition (subtraction) to get rid of the 2. 4x+2=10 ...

*December 19, 2010*

**Math**

y=7x

*December 19, 2010*

**math**

Tyler, I did one of these for you yesterday. You should be able to do them on your own now. Don't post any more of these problems without attempting them yourself (and showing work) first!

*December 18, 2010*

**math**

What are you asked to do with this?

*December 17, 2010*

**Math**

Make up set of 7 numbers having these landmarks: mode 21, Median 24, maximum 35, range 20. If the maximum is 35 and the range is 20, that means the minimum is 15. 15 __ __ __ __ __ 35 We know the median (number in the middle) is 24. 15 __ __ 24 __ __ 35 The mode (used most ...

*December 17, 2010*

**math**

Where are your answers?

*December 17, 2010*

**5th grade**

3 * 3 * 3 = 27

*December 17, 2010*

**spanish**

You can respond as follows: Yo tengo que comprar un/una ________ para el cumpleaños de mi madre/padre.

*December 16, 2010*

**writing in math**

He/she needs a multiplication story, not a division story. 5 classmates each have 2 pencils. How many pencils do they have in all? 5 * 2 = 10 pencils

*December 16, 2010*

**math**

sentence*

*December 16, 2010*

**math**

There are two factors in that sentences, the 9 and 4.

*December 16, 2010*

**7th math**

At the mall, you spent a total of $170.86. You bought 2 pairs of jeans for $ 39.95 each,a jacket for $45.99, and shirts for 14.99each. How many shirts did you buy? jeans=$79.90 jacket=45.99 total cost so far=125.89 170.86-125.89=$44.97 14.99x=44.97..solve for x, that's ...

*December 16, 2010*

**Math**

120abc

*December 16, 2010*

**math**

Yes. If the groups were equal, you could multiply them to get the answer quicker. Since they are unequal, you can only add.

*December 15, 2010*

**Math**

Where was this when I was in school?? LOL.

*December 15, 2010*

**Aims math [help please very appreciated]**

15x+4=21+2x Subtract 2x from each side. 13x+4=21 Subtract 4 from each side. 13x=17 Divide each side by 13. x=17/13

*December 15, 2010*

**algbra 2**

Yes.

*December 15, 2010*

**algbra 2**

sqrt8/sqrt9=sqrt8/3

*December 15, 2010*

**Math**

9 1/8 - 2 5/8 Since you can't do 1/8-5/8 because you can't do 1-5, you have to "borrow".. 9 1/8 becomes 8 9/8...if it was just 9 it would be 8 8/8 because 8/8=1..so it's 8 9/8 8 9/8-2 5/8=?

*December 15, 2010*

**math-still needs help**

That's not what he's referring to, Gabby. David, that means out of 25, pick 8. I forget how to solve these though, so hopefully someone else will respond.

*December 15, 2010*

**3rd grade Shurley English**

The responses were not by the 3rd grader, only the question was.

*December 15, 2010*

**math**

9-2(3x+1)>37 9-6x-2>37 7-6x>37 -6x>30 x<-5 (When dividing by a negative, greater than becomes less than and vice versa.)

*December 15, 2010*

**math**

Already done. Check your other post.

*December 15, 2010*

**math**

What's the LCM of 10 and 12?

*December 15, 2010*

**Math**

Thanks!! :)

*December 14, 2010*

**Math**

A punter's first four punts in a football game are 30 yds, 20 yds, 27 yds, and 29 yds. After a fifth punt, the punter's mean was 30 yards. How long was the fifth punt? Please help!

*December 14, 2010*

**Algebra**

(11+12+5+3+x)/5=7.4 31+x/5=7.4 Multiply both sides by 5 31+x=37 x=6

*December 14, 2010*

**english/grammar/manners**

Yes, there is a common between yes, ma'am. No, I don't think it's necessary to say that. I think it's a bit old school. There are other ways to show respect besides that.

*December 14, 2010*

**Substitution method**

x=2y y=2x+3, y=2(2y)+3 y=4y+3 Solve that and then replace it to solve for x. You can post your answer if you want it checked or need more help.

*December 14, 2010*

**incomplete**

TR=what?

*December 14, 2010*

**algebra**

3/8+y=-3/16 y=-3/16-3/8 y=?

*December 13, 2010*

**INCOMPLETE**

Write WHAT as a product of factors?

*December 13, 2010*

**11th grade**

Yes, that will actually be a right triangle. You can do the pythagorean theorem to check it.

*December 13, 2010*

**math**

1/2x+1/3y=5 1/4x+1/3y=4 First I want to get rid of the fractions..multiply the first equation by 6 and the second one by 12. 3x+2y=30 (1) 3x+4y=48 (2) Now multiply the first equation by -1. -3x-2y=-30 3x+4y=48 Add the equations together. 2y=18 Solve for y, put it back into (1...

*December 13, 2010*

**Algebra**

Using the compound intrest formula's A=P(1+r/n)^nt and A=Pe^rt to solve the problem given. Round the answer to the nearest cent. I have to find the accumulated value of and investment of $20,000 for 6 years at an intrest rate of 4.5% compounded semiannually,quarterly,...

*December 12, 2010*