Saturday

September 24, 2016
Total # Posts: 135

**College Algebra**

Solve for elimination method,substitution method and cramer's rule for 8x - 4y + 2z =16

*September 1, 2016*

**College Algebra**

8x - 4y + 2z=16 for elimanation method,substitution method and cramer's rule?

*September 1, 2016*

**math**

place value of 95732

*June 22, 2016*

**Chemistry**

Thank you. This mix is used in concrete technology. They mix Na2SiO3 solution and NaOH solution and add it to fly ash and aggregate to make concrete. The resulting SiO2/Na2O ratio is important for making concrete. I want to know how it is determined. I have seen somewhere they...

*June 16, 2016*

**Chemistry**

How to determine SiO2/Na2O ratio after mixing Na2SiO3 (SiO2=30%, Na2O=9%, water=61%)and NaOH (8M)solutions?

*June 16, 2016*

**life orientation**

I don't know

*April 25, 2016*

**science**

uuuummm..... isn't that question for Math? XD I've seen it in Algebra before.

*February 4, 2016*

**langauge arts**

Could any of you help me on the same question? I know I can rule out C. But I am stuck.. Please let me know if you can :)

*January 19, 2016*

**Math**

sqrt = square root so: sqrt (36+64) = sqrt (100) = 10 and the other one is: sqrt [36+25+81] = sqrt [142] ≈ 11 or 12

*January 14, 2016*

**Science: Chemical Reactions**

Thanks SO MUCH :D

*December 7, 2015*

**Science: Chemical Reactions**

Sodium chloride is formed when the metal sodium bonds to the nonmetal chlorine. The atoms are held together by a(n) ___. PLEASE HELP I DON'T GET IT! :"(

*December 7, 2015*

**physics 20**

What is the true weight of a 60-kg astronaut on: a) the surface of Mars? b) the surface of Saturn? given: mass of Mars= 6.42x10^23 mass of Saturn= 5.69x10^26

*December 6, 2015*

**Physics**

Calculate the true weight of a 60 kg astronaut on: a) the surface of Mars, and b)the surface of Saturn. Mass of Mars= 6.42x10^23 Mass of Saturn= 5.69x10^26

*December 5, 2015*

**health**

... I'm just gonna ignore all that... It is Egg because the sperm cannot be fertilized, it fertilizes. Eggs turn into embryo after a certain amount of time too.. so ya, its Egg. And ya, I'm not a teacher. So what? I like helping. XD

*November 2, 2015*

**math**

Which of the following is not equivalent to -1/2 A. -1/-2 B. -[1/2] C. 1/-2 D.-0.5 The answer is A

*September 9, 2015*

**math**

St. Augustine beach is changing -3ft. each year due to erosion. What will the overall change to the beach be in 7 years if this continues to occur? The over all change will be -21

*September 9, 2015*

**math**

It will b A -4.08

*September 9, 2015*

**math**

A diver descended at a constant rate of 12.24 feet every 3 minutes. Which of the following is true? A. After one minute, the diver was at-4.08 feet B. After one minute, the diver was at 4.08 feet C. After one minute, the diver was at -6.62 D. After one minute, the diver was at...

*September 9, 2015*

**math**

In a science experiment, the temperature fell 63 degrees Fahrenheit in 9 minutes. If the temperature fell at the same rate every minute, how many degrees did it change each minute? 63 divide by 9 = 7

*September 9, 2015*

**Math**

A quality control sample taken on a certain day revealed that for every 2000 units of a particular product manufactured,30 units were defective ?

*August 26, 2015*

**Math**

A blueprint 8 centimeters wide and 14 centimeters high is to be enlarge.if the height of the enlargement will be 30 centimeters, how wide will it be?

*August 26, 2015*

**6th grade math**

What is the greatest number of pictures each 2.5 and 3.5 inches that a photographer can print on an 8 inch by 10 inch paper?

*July 30, 2015*

**english**

All correct. I know because I compared her answers with mine we both got 100%. ;3

*April 27, 2015*

**PLEASE HELP ME!!!**

it seems to be C.

*April 24, 2015*

**English**

I agree with @bobthebuilder too. You need to calm down, @SOMEONE WHO DOESN'T LIKE WRITECHER XD ur funny, @RoastedToaster

*April 24, 2015*

**statistics**

A new national survey found that Americans drink an average of 6 glasses of water daily, instead of the recommended 8. Assuming that the number of glasses of water is approximately normally distributed with a standard deviation of 1.7 glasses, what proportion of Americans ...

*April 16, 2015*

**Math**

30% which is also C., right @Ms. Sue ?

*April 6, 2015*

**science**

Yea, it's A. 5g I got 100% :3 Thanks!

*March 30, 2015*

**General Chemistry**

What is the concentration in ppm of Ag in a 245 lb of Ore that contains 83.5g of silver?

*March 23, 2015*

**language arts**

wow..... just... wow....

*March 18, 2015*

**Art.**

Yep, Damnnnn Daniellll is correct that Lamp is correct. I just did the Quiz (for Connections Academy).

*March 10, 2015*

**Writing - APA**

For writing in APA and your table goes on two pages, do you just repeat the table header rows? I already titled the table on the first page.

*March 1, 2015*

**Economics**

When dealing with the probabilities in the payoff matrix, would you always go with the highest calculated value? For example, I calculated payoff by multiplying the hours it would take to do something times the probability. Then used those values and took the sum for each row ...

*February 24, 2015*

**math**

The scale of a map is 5m= 15 mi maps 8.2 actual____

*February 11, 2015*

**pre-algebra**

The scale factor for a blueprint is 7cm= ___m Model 40.4 cm actual 80.6m

*February 11, 2015*

**Language Arts**

2 is wrong, @simplyme., these are this is the right answer: 2.) b The rest are correct, tho, good job. :3

*January 26, 2015*

**Math**

Jim, Juan, Mary, and John are all managers for the same company •Jim always meets the sales goals •Juan exceeded the goal by 15% on Tuesday and 10% on Wednesday. •Mary’s goals for each day of the week are 5% lower than the goals for other managers. •...

*January 5, 2015*

**L.A help please**

huh, I thought it was A... Oh well, I'm glad I checked my answer!

*December 18, 2014*

**Chemistry**

how many milliliters of 4 M h2so4 are needed to react completely with 23.7g of Bao2

*December 13, 2014*

**physics**

5mins

*December 5, 2014*

**P.E. help please**

I know that this is 2 years later, but D IS correct, I did the assessment. WHAT I THINK: They should have done "none of the above" for D and "all of the above" for C. Connections can make things so confusing sometimes. >_<

*November 16, 2014*

**Science Help!**

Yea, I thought it was B. Thnx guyz!

*November 14, 2014*

**science Help 911!!**

LOL btw, thanks @DrBBob222 and @Maggie

*November 14, 2014*

**Science Help!**

DO NOT CHOOSE B!!!!! It is A. I tried, and I got it wrong. :"( Answer: A. respiration, photosynthesis, decomposition It doesn't really make sense to me at this moment... But I'll get it sooner or later.

*November 14, 2014*

**Sales**

Everyone but Mary meets their sales goals on Monday. True? False? or Indeterminate? Juan's best day was Tuesday. True? False? Indeterminate?

*October 14, 2014*

**Language Arts**

Girl that has no friends is correct!

*October 14, 2014*

**HISTORY**

Kendy is right :)

*September 24, 2014*

**Language Arts**

You are such a brusselsproute

*September 18, 2014*

**science**

OMG yessssss. It worked

*August 28, 2014*

**algebra**

2/5 of the total questions on a test have the answer Choice of C. If 50 questions have the answer C, how many total questions are there? I've tried 20/50 2/5 times 50/1

*August 26, 2014*

**math**

The game involves tossing a penny and a dime along with rolling a die. to win the penny land heads up, the dime land tails up and roll a 6 on the die. what is the probability that he will win on the first play

*July 28, 2014*

**math**

Correct. I got them both right. It's for confirmation.. :3

*May 7, 2014*

**history**

*rubs forehead, sighing* You all have become very distracted...

*May 1, 2014*

**math (cant figure it out)**

........... READ. XD 3. 30% 4. None of these 5. 37.5% Happy now? :3

*April 20, 2014*

**science**

Something is right. I just got a 100

*February 27, 2014*

**analytical chemistry**

You are asked to make a 0.3M CaCl2 solution in a flask that can hold 200 ml. How would you do it?

*February 15, 2014*

**analytical chemistry**

How much NaOH (in grams) would there be in 0.25 litre of a 0.3M solution?

*February 15, 2014*

**8th CCA Science**

you mortals don't make any sense. XP

*January 22, 2014*

**Science**

@blahh , @check my answer is right, @anonymous wanted us to check his answers, not do them for him. >.< Anyways, @anonymous , here are the answers: (100% CORRECT,I did the assessment) 1. A. a solar eclipse ... 2. B. a lunar eclipse can only occur when there is a full ...

*January 19, 2014*

**physices**

an object is falling freely from rest of height of 65m above the ground what is the height of the object from the ground in meter when it reaches velocity of 20m/s?

*October 30, 2013*

**Science**

Got a 100

*September 30, 2013*

**physics 1**

a helicopter is flying at an altitude of 1000 m above the ground, with a horizontal velocity of 50 m/s, how far from the rally point should the relief package be dropped?

*April 24, 2013*

**chemistry**

20mL ethanol(density=o.789g/mol) is dissolved in sufficient water to produce a 200mL solution. the density of the solution is 0.982g/mL. what is the molarity?

*March 11, 2013*

**Math**

What the next number should be? 6 18 20 10 30 32 16

*February 25, 2013*

**english**

Proper use of apostrophe in sentence: Oklahoma's dust storms in the 1930's blew away tons of soil. Correct?

*January 23, 2013*

**Algebra II**

The weight of a body varies inversely as the square of its distance from the center of the earth. If the radius of the earth is 4000 mi, how much would a 200 lb man weigh 1000 mi above the surface of the earth?

*January 3, 2013*

**math**

If you run 1 mile on Monday and then double everyday how many miles will you run by friday?

*October 11, 2012*

**Math**

Joe picked leaves, he has 3 kinds. He has 2 times as many elm leaves as maple leaves, and 5 times as many oak leaves as maple. He has 32 leaves. How many of each kind does Joe have?

*October 2, 2012*

**calculus**

pls integrate and differentiate e^x^2 and x/y square root of x^2+y^2 in terms of x.

*July 5, 2012*

**Research skills**

Place the following call numbers in the proper order based on the Dewey Classification A. 530 C68s 1985 B. 530.1 A12f 1976 C. 530.028 M52c D. 530 A82u 1988 E. 530.0274 C52e

*May 31, 2012*

**physics**

Sam is 180cm tall. He stands 60 cm in front of a tall plane mirror.How tall is Sam's image

*April 17, 2012*

**Chemistry**

Toluene, C6H5CH3, is a liquid similar to benzene, C6H6. It is the starting material for other substances, including trinitrotoluene (TNT). the molality of toluene in a solution that contains 26.2 g of toluene and 132 g of benzene. Calculate the molar fraction of toluene and ...

*March 29, 2012*

**Chemistry**

Toluene, C6H5CH3, is a liquid similar to benzene, C6H6. It is the starting material for other substances, including trinitrotoluene (TNT). Find the molality of toluene in a solution that contains 26.2 g of toluene and 132 g of benzene.

*March 29, 2012*

**Chemistry**

An aqueous solution is 0.257 m NaOH. What are the boiling point and freezing point of this solution?

*March 29, 2012*

**chemistry**

Calculate the vapor pressure lowering of water when 5.67 g of glucose, C6H12O6, is dissolved in 25.2 g of water at 25 ºC. The vapor pressure of water at 25º C is 23.8 mmHg. What is the vapor pressure of the solution?

*March 29, 2012*

**Statistics**

The distribution of scores on a test is mound-shaped and symmetric with a mean score of 78. If 68% of the scores fall between 72 and 84, which of the following is most likely to be the standard deviation of the distribution? 3, 1, 4, 6?

*March 12, 2012*

**algebra**

The diameter of an electric cable is normally distributed, with a mean of 0.8 inch and a standard deviation of 0.01 inch. What is the probability that the diameter will exceed 0.81 inch

*March 8, 2012*

**statistics**

. An automobile is selling a new model car with an advertised in‐city mileage of 27 MPG. As with most car models, there is no associated measure of variability (variance, SD, etc.) included with the advertised MPG. You write the manufacturer and request details on ...

*March 1, 2012*

**chemistry**

Luckily I can ask for more help tomorrow...lol Is the formula different for "how would you make 40mL of 30%ETOH starting with 75% ETOH and water" different (because it's all liquid vs. solid and liquid?) txs

*February 13, 2012*

**chemistry**

the question actually reads "how would you MAKE .25L of a 0025M solution of NaCL starting with solid NaCL and water? 2nd Q: ends with starting with 2.0M NaCL? Based on a lab that we haven't even had yet.....lost. txs

*February 13, 2012*

**chemistry**

Convert .25 L of a .025 M solution of NaCL starting with solid NaCI and water

*February 13, 2012*

**algebra**

: If Bobby fives Jane three pens, they have the same number of pens. But if Jane gives Bobby three pens,he will have three times as many pens. How many pens does each student have?

*February 6, 2012*

**physics**

To show your friends how strong you are, you start pushing a big container with mass 50 kg along a long, flat highway. While you are pushing the container in a horizontal direction with an average force 350 N, it moves with acceleration 1 m/s/s. After 5 seconds of pushing you...

*November 16, 2011*

**math**

find the sum of the square of -3 1 over 3 and the cube 3 over 2..

*November 9, 2011*

**math**

find the sum of the square of -3 1/1 and cube of 3/2

*November 9, 2011*

**Math**

Danny gave Rose $28 less than she already had. She now has $120. that means Rosario originally had how much????

*November 1, 2011*

**Finance**

How much is a 9 month CD worth that started out at $1,000.00 at 4.40% worth after 15 years

*October 4, 2011*

**History**

b is wrong

*October 3, 2011*

**chemistry**

(a) (i) Draw the abbreviated structural formula, in truncated form, of the compound that would be produced from the reaction of one molecule of glycerol with one molecule each of A, B and C .Circle and name the new functional group(s) produced. What type of reaction is ...

*September 15, 2011*

**science**

Newton’s law of gravity is used with great success in most everyday situations, and indeed, in planning planetary space missions such as the Rosetta probe. However, Einstein’s theory of general relativity and a theory of quantum gravity are needed to describe the ...

*August 28, 2011*

**alegbra**

The diameter of an electric cable is normally distributed, with a mean of 0.8 inch and a standard deviation of 0.01 inch. What is the probability that the diameter will exceed 0.81 inch

*August 27, 2011*

**science**

The total power output of the Sun is about 3.8 × 1026 W, and the power-producing core has a radius of about 1.4 × 105 km (about 20% of the full radius of the Sun). Using these figures and your knowledge of the energy release in the proton– proton chain ...

*August 24, 2011*

**science**

The brightest galaxy in the Bootes cluster of galaxies is found to have a redshift of 0.13. (Assume the speed of light, c, is 3.0 × 10 8 m s−1.) (i) Assuming the Hubble constant, H0, is 70 km s−1 Mpc−1 to two significant figures, calculate the distance ...

*August 22, 2011*

**biology**

In chickens, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (ZW). The mechanism for inheritance of the sex chromosomes is exactly the same as for X and Y sex chromosomes in other species. In chickens the character of ‘barred’ or...

*July 4, 2011*

**biology**

A poultry farmer hopes to profit from the current craze for keeping egg laying chickens as pets and wishes to increase his stock of interesting and unusual breeds. (a) The farmer crossed a pure-breeding white chicken with a pure-breeding black chicken and found that 100% of ...

*July 4, 2011*

**business calculus**

For the function f(x) = 1/(x2+14x-42) there are two vertical asymptotes. Determine the x-coordinate of each one

*February 10, 2011*

**Physics**

A hydrometer is an instrument for measuring the specific gravity of a liquid. For example, producers of maple syrup use the hydrometer to find how much sugar is in the collected sap. Markings along a stem are calibrated to indicate the specific gravity for the level at which ...

*January 26, 2011*

**7th grade**

i need help in Math with Fractions can i have some pointer to remember it. P.s. Thank you guys if u can help

*December 7, 2010*

**Physics**

20 C

*December 2, 2010*

**physics**

a current-carrying wire is oriented at right angles to a uniform magnetic field. if the lenght of the wire is 0.50m and it experiences a force at 0.90n while carrying a current of 4.0a. what is the strength of the magnetic field?

*December 1, 2010*