Wednesday

October 26, 2016
Total # Posts: 921

**Geometry**

ABCD is a parallelogram. If AB = 2x - y, CD = 7, BC = x + y , AD = 2 find x and y.

*September 4, 2011*

**geometry**

Triangle ABC is congruent to triangle DEF. If the length of AB is 12 feet and the length of AC is 10 feet. Find the length of DE. can someone please help me on this question please and thank youu :)

*September 3, 2011*

**physics**

A plastic tube allows a ﬂow of 15.5 cm3 /s of water through it. How long will it take to ﬁll a 206 cm 3 bottle with water

*August 29, 2011*

**math**

Evaluate the expression n+(-5) for each value of n. n=312

*August 11, 2011*

**Maths**

What is the estimate quotient of the following: 48.3 divided by 7

*July 20, 2011*

**Maths**

What is the estimate of the following quotient: 48.3 divide by 7

*July 20, 2011*

**Substitution Method**

4x+5y=12 2y=6x+8

*July 4, 2011*

**3rd gr math - Tenths**

Question reads....Explain how to find the mix number and decimal for nine and one tenth. Please help.

*June 1, 2011*

**Algebra 2**

Find the sum of the infinite series 1/3+1/9+1/27+... if it exists

*May 27, 2011*

**biology**

do mutations form new or old genes????

*May 18, 2011*

**science**

While doing a scinece project with my daughter we attempted to melt two sugar cubes. We poured alcohol on one sugar cube and vinegar on the other. The sugar cube with the alcohol melted at a faster speed. Why was this?

*May 13, 2011*

**math**

a ladder rests against the top of a wall. The head of a person 3.5 feet tall just touches the ladder. The person is 3 feet from the wall and 7 feet from the foot of the ladder. What is the height of the wall?

*May 9, 2011*

**AP US History Exam**

Is it worth it to study for the AP US HIstory or AP European history exams the night before, or should I just get a lot of sleep and eat breakfast?

*May 5, 2011*

**biology**

could you put the following into order from smallest to largest?? DNA GENE CHROMOSOME

*April 28, 2011*

**math**

1.8

*April 28, 2011*

**biology**

To ensure that the mother will have mature egg cells available for in vitro fertiliazation, she must be treated with chemicals that regulate her reproductive cycle. identify these chemicals tha tregulate the female reproductive cycle. Please help me

*April 24, 2011*

**geometry**

how do you find the area of an equilateral triangle with the perimeter of 30ft.

*April 22, 2011*

**help me in math!**

is -5 a real #? rational #? irrational #? whole #? integer? counting (natural) #?

*April 13, 2011*

**math help me plz!!**

i recievbed 200.00$ for a gradution gift. i spent 50% on clothing. 20%on cds. 25% on movies. and 5% on savings. how much money did i spent on each catergory?

*April 13, 2011*

**math help me!!**

is square root of 56 a rational number? explain uranswer using what you know about rational and irrational numbers. thnx alot!

*April 13, 2011*

**chemistry**

A 3.0−L sample of a 6.2M NaCl solution is diluted to 75L .

*April 12, 2011*

**7th grade math**

how to put 26,000 in a notation

*March 27, 2011*

**geometry**

The perimeter of the rectangle is 19 inches. The perimeter of the inscribed triangle is also 19 inches. What is the width of the rectangle? What is the lengths of the rectangle? sides of isosceles triangle = leng of rectangle + 2 base = width of rectangle

*March 22, 2011*

**Chemistry**

which equation represents an oxidation-reduction reaction? 1.HCl+KOH-->KCl+H2O 2.4HCl+MnO2-->MnCl2+2H2O+Cl2 3.2HCl+CaCO3-->CaCl2+H2O+CO2 4.2HCl+FeS-->FeCl2+H2S

*March 20, 2011*

**Chemistry**

Zn(s)+Cu2+(aq)-->Zn2+(aq)+Cu(s) which particles must be transferred from one reactant to the other reactant ? 1.ions 2.neutrons 3.protons 4.electrons 4?

*March 20, 2011*

**Chemistry**

a redox reaction is a reaction in which 1.only reduction occurs 2.only oxidation occurs 3.reduction&oxidation occur at the same time 4.reduction occurs first and then oxidation occurs i think its 3 or 4.

*March 20, 2011*

**Chemistry**

In the reaction: Cu(s) + 2 Ag+(aq) ---> Cu2+(aq) + 2 Ag(s, the oxidizing agent is ? 1.Cu 2.Cu2+ 3.Ag+ 4.Ag i know its Ag but is it Ag+ or just Ag? what does that extra plus mean?

*March 20, 2011*

**Chemistry**

in the reaction:Ni+SN4+-->Ni2+ (+)Sn2+ which species has been reduced? 1.Ni 2.Sn4+ 3.Ni2+ 4.Sn2+ i know its def Sn but im not sure which one.

*March 20, 2011*

**Chemistry**

In the reaction: Cu(s) + 2 Ag+(aq) ---> Cu2+(aq) + 2 Ag(s) 1.Cu 2.Cu2+ 3.Ag+ 4.Ag i know its Ag but is it Ag+ or just Ag? what does that extra plus mean?

*March 20, 2011*

**Chemistry**

In the reaction 2H2S + 3O2 -> 2SO2 +2H2O, the oxidizing agent is 1.oxygen 2.water 3.sulfur dioxide 4.hydrogen sulfide oxygen?

*March 20, 2011*

**Chemistry**

all redox reactions involve 1.the gain of electrons only 2.the loss of electrons only 3.both the gain and the loss of electrons 4.neither the gain nor the loss of electrons 3, right?

*March 20, 2011*

**Chemistry**

human blood contains dissolved carbonc acid in equilibrium with carbon dioxide and water according to the reaction: h2CO3(aq)<-->CO2(aq)+H2O(l) explain why decreasing the concentration of Co2 will ultimately decrease the concentration of H2CO3.

*March 17, 2011*

**Math **

The Table shows some common scales used in a model railroading.For each scale,find the length of a model of an 82-foot long boxcar.Give the length of each model in inches. Scale Name/Scale N 1:160, S 1:64, O 1:48

*March 16, 2011*

**Math**

The scale 1 in 120ft was created a 169.3 tall model of Alaska's Mount McKinely.Estimate the height of Mount McKinley from the height of the model.

*March 16, 2011*

**Chemistry**

C5H12

*March 14, 2011*

**MATH HELPP!!**

FRANCIS PACKED A BAG FOR HER VACATION.SHE TOOK 4 T SHIRTS,2 SWEATERS, 3 PAIRS OF JEANS, HOW MANY COMBINATIONS OF 3 COULD SHE MAKE USING EACH ITEM ONCE.MAKE A TREE DIAGRAM ---->>> THNX!!

*March 10, 2011*

**math hellp me please**

write a algebraic expression representing 3 more than the quotient of 4 and a number,n

*March 6, 2011*

**math**

write an algebraic expression representing three less than half a number

*March 6, 2011*

**math**

write an algebraic expression representing three less than half a number

*March 6, 2011*

**math helpp**

kathy will babysit six cats. she charges $75 for the week for supplies and $8 for each hour,h,she works. write an expression for the total amount kathy charges. -->> THNX!!!

*March 6, 2011*

**math**

al has 3 less than 4 times as many candy bars as neil,n. write an expression representing how many candy bars al has compared to neil --->>>> THNX!:))

*March 6, 2011*

**beginning/intermediate college algebra**

true or false:the graph of the equation 3x-5y=10 goes through (0,-2)

*March 4, 2011*

**Chemistry**

26

*February 24, 2011*

**Math**

Use the sum or difference identities to find the exact value of each trigonometric function. sec pi/12 Thanks :)

*February 17, 2011*

**math**

A gas tank is filled 3/4 if it holds 16 gallons how much gas still remains

*February 16, 2011*

**math**

32 38 44

*February 15, 2011*

**Shirley English**

What classifcation is this sentence My geandmother from Mempis is the best cook in the world

*February 9, 2011*

**math**

the capacity of a measuring pitcher is 96 fluid ounces.how many quarts can the pitcher hold?

*February 8, 2011*

**math**

if m<8=82degrees, then m<7=

*February 8, 2011*

**9th grade biology**

How can you tell, using a microscope, that an onion cell has depth?

*February 8, 2011*

**4th grade math**

no, 8 slices of apple and 24 orange slices 32 is the amount of slices you have in total

*February 7, 2011*

**maths**

If a farmer has 60 cows on his farm and 53 sheep then how many goats does he have?

*February 6, 2011*

**english**

Where does this semicolon go... All states have flags some are quite beautiful.

*January 24, 2011*

**3 G Math**

How do I answer this......Barry says 9x8x(any other number) will always be greater than the product of 2x9x4. Do you agree? Explain?

*January 13, 2011*

**3rd grade math**

How do I answer this......Barry says 9x8x(any other number) will always be greater than the product of 2x9x4. Do you agree? Explain?

*January 13, 2011*

**third grade math**

How do I answer this......Write three ways to find 3x2x4.

*January 13, 2011*

**3rd grade math**

Barry says 9x8x(any oter number) will always be greater tan te product of 2x9x4. Do you agree? Explain?

*January 13, 2011*

**science**

A student stands at the edge of a diving board that is 3 m high. The student's weight is 350 N. What is the student's gravitational potential energy relative to the surface of the water?

*January 11, 2011*

**3rd grade math**

how do i answer this question....how can you use the multiplication facts for 3 to help you find the multiplication facts for 9?

*January 11, 2011*

**4th grade math**

gina wrote that4/5 is greater than 0.75 .Is gina correct?explain why or why not

*January 10, 2011*

**Physics**

A 15.0 gram bullet strikes and becomes embedded in a 1.24 kg block of wood placed on a horizontal surface just in front of the gun. If the coefficient of kinetic friction between the block and the surface is 0.280, and the impact drives the block a distance of 11.0 m before it...

*January 5, 2011*

**6th grade**

What percent of the circles are not white 2/5

*December 21, 2010*

**math fractions**

7/16 5/8 3/4

*December 14, 2010*

**math 3rd grade**

Writing in math - How can multiples of 10 also be multiples of 5?

*December 14, 2010*

**3rd grade math II**

I need to write a sentence for the following Reasoning: How can counting by 10's help you multiply by 10's?

*December 14, 2010*

**3rd grade math**

The question reads: Reasoning: How can counting by 10's help you multiply by 10's?

*December 14, 2010*

**Math**

write a number pattern for 8 starfish each has 5 arms.

*December 13, 2010*

**geometry**

do the lenghts 11, 15, and 40 make a triangle?

*December 8, 2010*

**Geometry**

thankx reiny!

*December 7, 2010*

**Geometry**

In an equilateral triangle, what is the difference between the sum of the exterior angles and the sum of the interior angles?

*December 7, 2010*

**READING**

read 2 chapters a day and if youh get really into da book then u will prob' just keep readin' it anyways

*December 7, 2010*

**World History**

Buddhism

*December 5, 2010*

**World History**

The religion based on the teachings of Siddhartha Gautama is known as?

*December 5, 2010*

**world history**

How did movable type help the Chinese to record their knowledge in a permanent form?

*December 5, 2010*

**Chemistry**

Draw the resonance structures for SeS2 and SiS2. There are 2 for SeS2 and 3 for SiS2. I really need help with this. If it can be explain with words, since pictures would be hard. Thanks!

*December 1, 2010*

**physics**

in deep space a gun is fired; how much force will be required to keep the bullet going?

*November 29, 2010*

**algebra**

$7.80/hour = ______ cents/minute?

*November 28, 2010*

**algebra**

$7.80/hour = ______ cents/minute?

*November 28, 2010*

**8th grade science**

hdhiwhgiturioyigpo

*November 15, 2010*

**1st grade**

Your past must be bad because you are shearching for answers.

*November 8, 2010*

**college Chemistry**

It requires 945.0 kJ/mol to break N2 molecules into atoms. Calculate the maximum wavelength of light that will still break these molecules apart. I tried converting the energy to kj and using E=hc/wavelength but that didn't give me the right answer...

*November 4, 2010*

**college Chemistry**

it did work, thanks!

*November 4, 2010*

**college Chemistry**

It requires 945.0 kJ/mol to break N2 molecules into atoms. Calculate the maximum wavelength of light that will still break these molecules apart. I tried converting the energy to kj and using E=hc/wavelength but that didn't give me the right answer...

*November 4, 2010*

**math**

-7w+23=8w+1

*October 29, 2010*

**Chemistry - College**

The ionization energy of a certain element is 472 kJ/mol. However, when the atoms of this element are in the first excited state, the ionization energy is only 166 kJ/mol. Based on this information, calculate the wavelength of light emitted in a transition from the first ...

*October 26, 2010*

**Physics**

Ok thank you.

*October 26, 2010*

**Physics**

You are very slowly pushing up an incline with a calculator sitting on it. The coefficient of static friction is 0.7. At what angle θ will the calculator start sliding?

*October 26, 2010*

**Physics**

You are very slowly pushing up an incline with a calculator sitting on it. The coefficient of static friction is 0.7. At what angle θ will the calculator start sliding?

*October 26, 2010*

**Physics**

You are very slowly pushing up an incline with a calculator sitting on it. The coefficient of static friction is 0.7. At what angle θ will the calculator start sliding?

*October 26, 2010*

**College Chemistry**

Given that delta Hrxn for OH- ions is -229.6 kJ/mol, calculate the enthalpy of neutralization when I mole of a strong monoprotic acid (such as HCl) is titrated by 1 mole of a strong base (such as KOH) at 25-degrees C.

*October 26, 2010*

**English-Article on the Hunger Games**

you should put in that bella and edward are from the top selling twilight series, other than that i think that the artical is amazing

*October 24, 2010*

**social studies**

i need to draw a kid verson of a separatist

*October 21, 2010*

**chemistry**

An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission? (Planck's constant is 6.626 × 10-34 joule seconds, the speed of light is 2.998 × 108 m/s)

*October 21, 2010*

**math**

I have more ones than tens. The value of me tens digit is 80. What number am I?

*October 19, 2010*

**Physics**

A car (mass 880 kg) is traveling with a speed of 44 mi/h. A bug (mass 7.9 mg) is traveling in the opposite direction. What speed would the bug need in order to slow down the truck by one mile per hour in a big bug splash (i.e., final speed 43 mi/h)? I don't know how to ...

*October 17, 2010*

**finance**

Write a 200- to 300-word paper comparing long- and short-term financing. Describe situations in which each type of financing would be used. Post in your Assignment Section.

*October 16, 2010*

**Physics**

A car (mass 880 kg) is traveling with a speed of 44 mi/h. A bug (mass 7.9 mg) is traveling in the opposite direction. What speed would the bug need in order to slow down the truck by one mile per hour in a big bug splash (i.e., final speed 43 mi/h)?

*October 16, 2010*

**Physics**

A car (mass 880 kg) is traveling with a speed of 44 mi/h. A bug (mass 7.9 mg) is traveling in the opposite direction. What speed would the bug need in order to slow down the truck by one mile per hour in a big bug splash (i.e., final speed 43 mi/h)?

*October 16, 2010*

**Physics**

A car (mass 880 kg) is traveling with a speed of 44 mi/h. A bug (mass 7.9 mg) is traveling in the opposite direction. What speed would the bug need in order to slow down the truck by one mile per hour in a big bug splash (i.e., final speed 43 mi/h)?

*October 16, 2010*

**3rd grade**

140,000

*October 14, 2010*