Sunday

August 28, 2016
Total # Posts: 425

**Math, Quadratic Equations**

A photograph measures 20cm by 16cm. A strip of constant width is to be cut off the top and one side of the photo, so the area is reduced to 60% of the area of the original photo. Find the width of the cut. Thank you so much!
*August 17, 2016*

**algebra**

I am trying to rationalize a denominator and it is a squre root, like this : squre root of x+1 , i don't know what to do ,cause it isn't just a number it is the whole expression. plz help
*August 6, 2016*

**Calculus**

Find the area under the curve of y=-2x+6 from x=0 to x=3 using 3 strips of equal length using right endpoints. I tried this equation before and my answer was 9 but my teacher said it was wrong? and I also posted this before and Someone who helped me got the same answer. So I&#...
*June 17, 2016*

**Calculus**

I had wrote 9 as my answer for this question when I had tried it myself last week and my teacher gave it back to me yesterday saying it was wrong, which is Y I was also confused and decided to post the question on here , I'm very confused ..
*June 17, 2016*

**Calculus **

Given the function 6x+3y=18, find the area under the curve from x=0 to x=3 using 3 strips of equal length using the right end points. I was working on this and so I made the equation equal to Y=mx+b form so it ends up being Y=-2x+6, and now I am completely confused.. Please ...
*June 17, 2016*

**Physics**

Sorry my friend and I are both working on this together haha :)
*June 7, 2016*

**Physics**

Thank you so much!! Would you mind explaining what the equations mean in #1? I know that Force= Mass x Acceleration, but what was the other equation?
*June 7, 2016*

**Physics **

I'm sorry this is kind of a long question. I've been staring at it for about an hour now and I have no clue where to even start. Thank you so much!!!! A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 836 N. 1...
*June 7, 2016*

**Math**

A nationwide survey showed that 65% of all children in the United States dislike eating vegetables. If 4 children are chosen at random, what is the probability that all 4 dislike eating vegetables? (Round your answer to the nearest percent.) The answer is 18% but how and why?
*May 27, 2016*

**Math**

If no digit can be used more than once, how many 5-digit numbers can be formed only using the numbers 3,8,1,2,5, and 7? A: 350 numbers B: 717 numbers C: 722 numbers D: 720 numbers I guessed the answer 720 and got it right but I don't know why the answer is 720. Can someone...
*May 27, 2016*

**math**

I am currently dealing with the Richter scale and I have this formula 200=0.02*10^1.5*6.4/0.02*10^1.5*x I just cannot get x,plz help
*May 15, 2016*

**math**

This question involves the Richter's scale and it goes like this: According to Richter's scale magnitudes of earthquakes can be obtained from the following formula: M=logE÷1.44-3.64 . E stands for the free energy of a 6.4 earthquake ,calculate the magnitude of ...
*May 11, 2016*

**Calculus**

Using l'hopitals rule, evaluate the following: Lim x-->infinity Inx/2(x)^1/2 Limx-->0 (1/x - 1/e^x -1) I tried both multiple times and I'm still not getting an answer. For the first one I tried l'hopitals rule 3 times and I'm still getting infinity over ...
*May 10, 2016*

**math**

a cross section of a basement is shaped like a trapaziod. it has an area of 37.4 square meters, one base is 6.4 meters and the other base is 12.3 meters long. what is the height of the cross section? is it 18.7 or 2? or am i wrong?
*May 5, 2016*

**math**

nevermind i didvided 9.35 by 2 but how did u get the 4?
*May 5, 2016*

**math**

what is the 9.35h from?
*May 5, 2016*

**math**

a cross section of a basement is shaped like a trapaziod. it has an area of 37.4 square meters, one base is 6.4 meters and the other base is 12.3 meters long. what is the height of the cross section? is it 18.7 or 2? or am i wrong?
*May 5, 2016*

**math**

is it -6 or 10?
*May 4, 2016*

**math**

evaluate |-8| + |2| does it mean 8 + 2?
*May 4, 2016*

**math**

i get 2
*May 4, 2016*

**math**

How can i factorize this? 8x^3+1
*May 2, 2016*

**math**

Well, with log150 it's log3+log(10)^2-log2 With log75 it is equivalent to log3+log(10)^2-log(2)^2 Hope this helped
*May 2, 2016*

**math**

keri bought a pen she paid with a 1$ bill this is the change she got how much did the pen cost
*May 2, 2016*

**Spanish**

The personal a is usually used when the direct objects are people or pets. It usually comes before the direct object that's a person. So the answer would be C, because your are talking about a person, "the friend of my mother." "Vi a la amiga de mi mama."
*May 2, 2016*

**Spanish**

¡¡¡Trabajo asombroso!!! You got them all right!
*April 21, 2016*

**Math**

Eric had 8 apples. He gave away 1/4 of them. How many apples did he give away?
*April 20, 2016*

**English**

I need to find John Venn's peers that were studying the same stuff as he was during the same time or any peers that helped John Venn. I reaserched and could only find George Boole but I knbow that there has to be more. Please help?
*April 6, 2016*

**Art History**

During the 1940s and 1950s, when non-representational art was considered the artistic “mainstream,” this artist departed from the trend by representing the female nude: Jackson Pollock Helen Frankenthaler Willem de Kooning Mark Rothko I think it is Willem de Kooning.
*March 27, 2016*

**Maths-Geometry(Loci)**

solve it urself
*March 11, 2016*

**Math**

So when the greater power is on top, the limit will equal infinity and when it's on the bottom then it will equal 0?
*March 8, 2016*

**Math**

So I just have basic questions about limits which I just need to clear up. So when I'm solving for a limit , when the greater exponent is on the top of the fraction ex: x^2+2x/x+1 then the limit will always =infinity? And how do u know when a limit = 0 ? I just don't ...
*March 8, 2016*

**Biology **

1.,you drink salty beverages (clams to) and eat pretzels all day. At the end of the day your weight is way up. Why? I think it has something to do with the fact that our cells shrink in size ? I have no clue? 2. Athletes drink Gatorade . Why? Given the description, tell the ...
*March 3, 2016*

**Biology**

1.,you drink salty beverages (clams to) and eat pretzels all day. At the end of the day your weight is way up. Why? I think it has something to do with the fact that our cells shrink in size ? I have no clue? 2. Athletes drink Gatorade . Why? Given the description, tell the ...
*March 2, 2016*

**Social studies**

What will a soilder at Valley Forge say in a letter to his family.
*February 26, 2016*

**Math**

If a small airplane weighs 10,000 pounds how many ounces does it weigh
*February 23, 2016*

**math**

The answer will be 21
*February 23, 2016*

**math**

Emily's baby brother spends 7/8 of his day sleeping.How many hours does his baby brother sleep?
*February 23, 2016*

**math**

Hazel is making chocolate milk. She added 1/4 cup chocolate syrup to 2/3 cup milk.How much chocolate milk did Hazel make?
*February 23, 2016*

**math**

If Brittney is making trays of fudge.Her recipe calls for 2/3 cup of walnuts for each batch of fudge .How many cups of walnuts does she need to make 27 batches of fudge?
*February 23, 2016*

**Math**

Thank you so much Reiny:)
*February 20, 2016*

**Math**

Find the derivative : F(x)=√x
*February 20, 2016*

**science**

3 Nitroglycerine is used as an explosive. The equation for the explosion reaction is: 4C3H5(NO3)3 ( l ) 12CO2 ( g) 1 10H2O ( l ) 1 6N2 ( g) 1 O2 ( g) a How many moles does the equation show for: i nitroglycerine? ii gas molecules produced? b How many moles of gas molecules are...
*February 19, 2016*

**science**

You burn 6 grams of carbon in plenty of air: C ( s) + O2 ( g) = CO2 ( g) a What volume of gas will form (at rtp)? b What volume of oxygen will be used up?
*February 19, 2016*

**Math**

Limit = x-->infinity 11x^5+4x^3-6x+2/6x^3+5x^2+3x-1 My work: After doing lots of work I got 11/x^2 +4 -6/x^2 +2/x^3 All over 6+5/x+3/x^2-1/x^3 So then I get 4/6 but the correct answer is supposed to be infinity.. I'm very confused
*February 16, 2016*

**Math**

Thank you so much:)
*February 15, 2016*

**Math**

The time T required to drive a fixed distance varies inversely as the speed r. it takes five hours at 60 mph to drive a fixed distance. how long would it take to drive the fixed distance at 40 mph?
*February 15, 2016*

**Math **

Write the following decimal in words:47.813
*February 9, 2016*

**science**

a target t lies flat on the ground 3m from the side of a building that is 10m tall, as shown above. a student rolls a ball off the horizontal speed with which the ball must leave the roof if it is to strike the target moest nearly?
*November 4, 2015*

**AP-Physics**

which of the following pairs of graphs shows the distance traveled versus time and speed versus for an object uniformly accelerated from rest?
*November 4, 2015*

**Spelling**

Wednesday
*October 21, 2015*

**Social Studies**

I don't ask my teachers because they take too long to answer and I'm homeschooled so that's why I asked on here :/
*October 21, 2015*

**someone please help**

someone please help explain or provide examples
*October 21, 2015*

**Social Studies**

nation state a and nation state b share a border. the two nation-states are arguing over immigration policies regarding the border. what are two ways that the nation-sates could resolve their dispute?
*October 21, 2015*

**math**

Partial i ment
*October 15, 2015*

**math**

What are the lartial products for 62×45? I dont get it is it like 60×5 nad 40×2? If not can u tell me?
*October 15, 2015*

**Chem **

During your lab , you are provided with a stock antibody solution (Ab) that has a concentration of 400 ug/ul . you are provided with 10 ul( amount of stock antibody ) and 90 ul( amount of buffer ) . find the final dilution factor and the final Ab concentration.
*October 15, 2015*

**reading**

So together? Like ening or just ing?
*October 14, 2015*

**reading**

1 what is the suffix for deafening? Is it ing? 2. What does lurch mean? Answer ASAP PLZ
*October 14, 2015*

**Physics**

A uniform 4m plank with a mass of 45 kg is supported at its ends by two ladders. Two 75 kg men are standing on the plank. One is 1 m from one end and the other is 1.5 m from the other end. Determine the forces exerted by the ladders.
*October 14, 2015*

**Physics**

A 75 kg man sits at one end of a uniform seesaw pivoted at its center, and his 24 kg son at the other end. Where would his 55kg wife have to sit to balance the seesaw?
*October 14, 2015*

**Math**

what's your question?
*October 7, 2015*

**Science**

need help now please map is in link above
*October 7, 2015*

**Science**

Which letter arrows point to hanging valleys? Which letter arrows point to aretes? Name a peak on the map that is a horn. Feature E on the map is composed of glacial till. What type of glacial feature is E, and how did it form? Explain how turquoise lake formed? file:///C:/...
*October 7, 2015*

**Social Studies**

Thank you!
*October 7, 2015*

**Social Studies**

List the ways power is distributed in the U.S federal government and ways that power is limited. (Help soon please)
*October 7, 2015*

**Social Studies**

Describe the main function of the U.S. federal government
*October 7, 2015*

**Social Studies**

Thanks
*October 7, 2015*

**Social Studies**

true or false the pilgrims coming to the united states to seek religious freedom shaped american identity
*October 7, 2015*

**math**

I think you have to find the unit rate which is 25 miles on 1 gallon of gas
*October 7, 2015*

**Social Studies**

Thank you Ms.Sue
*October 7, 2015*

**Social Studies**

Why do nations have constitutions?
*October 7, 2015*

**Science**

go to brainpop and search in reproductive system
*October 7, 2015*

**math**

A mixture requires 4 cups of water for every 7 cups of flour used. How many cups of water should be used with 28 cups of flour? Cups of Flour 7 28 Cups of Water 4
*October 2, 2015*

**littlten elermenrty**

Write the 3digit number that answer the riddle.I have the same hundred digit as ones digit. The value of my tens is 50. The value of my ones digit is 4.
*October 1, 2015*

**math**

list all the 3 digit numbers that fit these clues. the hundreds digits is less than 3. the tens digit is less than 2. the ones digit is greater than 7
*September 22, 2015*

**Math**

A 40lb child sits at one end of a teeter-totter-totter which is 12 feet long and has the fulcrum in the center. How many feet from the fulcrum should a 60 lb child sit so the teeter-totter will balance?
*August 20, 2015*

**physics**

The pressure in the room also increased when the temperature increased, because pressure is ___________ to temperature.
*June 11, 2015*

**Chemistry**

How much time a 250 watt heater takes to heat up 1 kg of water from 20 degree c to 50 degree c?
*June 9, 2015*

**Chemistry**

A beaker contains 50 gm water at 20 degree c.How much water having temperature 60 degree C should be added to have an equilibrium temperature of 40 degree c?
*June 9, 2015*

**Physics**

310800
*June 5, 2015*

**Chemistry**

thank you!!!!
*May 5, 2015*

**Chemistry**

Calculate the value of the equilibrium constant for the following reaction: PbI2 (s) + 2I- (aq) <-> PbI4 ^ 2- (aq) The solubility product constant Ksp for PbI2 is 9.8e-9 and the formation constant Kf for PbI4^2- is 3.0e4 I have Ksp=[PbI4^2-] Kf= [PbI4^2-] / [PbI2][I-]^2 ...
*May 5, 2015*

**Chemistry**

I have no idea how to do this like idk I'm really confused with this question..
*May 2, 2015*

**Chemistry **

Use the info below to calculate how much it would cost you to produce 500g of NiSO4*6H2O . don't forget to include the cost of the original nickel token . Na2CO3*H2O costs $6.58/3 kg 6 M H2SO4 costs $12.65/5L 9 M HNO3 costs $10.53/2.5L Show clearly how you obtained your ...
*May 2, 2015*

**Socials 1 question**

How does birth control affect our world population? Please give me a list of ideas, no sites please I know it helps reduce population growth rate but please tell me more about countries who don't have birth control and what it results in etc.. Thanks :)
*April 7, 2015*

**Chemistry**

The density of air is about 1.29g/l at standard temp and pressure . Would carbon dioxide rise up or sink in the atmosphere ? Thanks:)
*March 13, 2015*

**math**

the question says solve for x x+3/5+4x/15=x-7/3
*January 19, 2015*

**Math**

Two numbers-- Their greatest common factor is 3. Their least common multiple is 90. How many answers are possible? Explain.
*December 19, 2014*

**physics**

A car is moving at 36 miles per hour. The kinetic energy of that car is 5 × 105 J. How much energy does the same car have when it moves at 115 miles per hour? Answer in units of J
*December 12, 2014*

**Physics**

A block is at rest on an inclined plane. The mass is 44 kg. µs = 0.54 Find the critical angle, θc, at which the block just begins to slide. Answer in units of ◦
*December 7, 2014*

**algebra**

A sausage sample was found to contain 65% moisture, based on fresh weight. The sausage was dried in an oven until its moisture content was 10% . A 2.0 g portion of the dried sausage was extracted with the Soxhlet method to determine the amount of crude fat. A clean Soxhlet ...
*November 29, 2014*

**Physics**

I don't understand how to do this : A force of 40 N accelerates a 7.17 kg block at 6.0 m/s2 along a horizontal surface. Determine the normal.
*November 25, 2014*

**English**

Ahhhh just submmitted the test- the third answer was wrong :( The final answer must be "states the primary basis for the act".
*November 19, 2014*

**English**

Hmm... I am stuck on that as well for flvs! :( I think it would be either the third or the fourth one. What did you get??
*November 19, 2014*

**Math**

I need help with my hw
*November 11, 2014*

**physics**

A ball is kicked at a 45* angle over a 6 ft fence 20 m away at 17 m/s. How far above the fence will the ball pass? No air resistance
*November 9, 2014*

**physics**

During a baseball game, a batter hits a pop-up to a fielder 92m away. The acceleration is 9.8 m/s^2. If the ball remains in the air for 5.8 seconds, how high does it rise?
*November 9, 2014*

**Algebra 1**

Thank you.
*October 16, 2014*

**Algebra 1**

I did this conversion problem, but I think it's incorrect. Problem: A bread slicer runs 20 hours per day for 30 days and slices 144,000 loaves of bread. How many loaves per minute are sliced? I did 20hr/1days times 30days/600hrs times 1hr/60mins times 144000 loaves/30days....
*October 16, 2014*

**math**

I don't know.
*October 7, 2014*