# Posts by Alex

Total # Posts: 3,677

**Physics**

How far x does it move down the incline before coming to rest? Suppose the incline is frictionless. The angle of inclination is 36 ◦ , the spring constant is 89.6 N/m the mass of the block is 9.05 kg and the acceleration of gravity is 9.8 m/s2 . Answer in units of m ...

*January 5, 2014*

**algebra 2 honors**

2x^2-12x+32=x^2 x^2-12x+32=0 (x-4)(x-8) Use foil to check x*x=X^2 -4*x=-4x x*-8=-8x -4*-8=32 Combine like terms x^2-12x+32 Hope this helps

*January 5, 2014*

**Social studies**

1. What do we call a generally flat region surrounded by higher land?____________

*January 4, 2014*

**World History**

26. The Italian fascists had a slogan: "Women into the Home." How did this support their political ideas? Any help would be greatly appreciated, I can't find the answer in my book. Please and thank you!

*December 30, 2013*

**math**

Factor 16x(a + b + c) + 7y(a + b + c) + 8w(a + b + c). Please show the steps for how you get the answer. Thanks

*December 16, 2013*

**math**

5√3 meters

*December 15, 2013*

**algebra**

HELP PLEASE!! ASAP!! If f(x)=2x+1 and g(x)=3x-5, find f(g(2))

*December 14, 2013*

**Algebra**

please help or examples!!!How many intergers are common to the solution sets of both inequalities? x+7>or = to 3x 3x+4<or = to 5x

*December 10, 2013*

**algebra**

If f(x)=2x+1 and g(x)=3x-5, find f(g(2)).

*December 10, 2013*

**math**

If f(x)=2x+1 and g(x)=3x-5, find f(g(2)).

*December 10, 2013*

**math**

If f(x)=2x+1 and g(x)=3x-5, find f(g(2)).

*December 9, 2013*

**math**

If f(x)=2x+1 and g(x)=3x-5, find f(g(2)).

*December 9, 2013*

**chemistry**

What volume of chlorine gas at 42.0 oC and 1.30 atm is required to react completely with 34.2 g of phosphorus (P4) according to the following reaction?

*December 7, 2013*

**Math - Calculus I**

Optimization Problem: Find the dimensions of the right circular cylinder of greatest volume inscribed in a right circular cone of radius 10" and height 24"

*December 5, 2013*

**math**

Matthew parks his car between Karen’s and Patrick’s apartment buildings. The car is 46 m in front of Karen’s apartment building. The angle of elevation from the car to the top of the building is 40°. Matthew’s car is 39 m away from Patrick’s ...

*December 2, 2013*

**Chemistry**

Calculate the heat in kilojoules needed to condense 185g of steam at 100 ∘C.

*November 24, 2013*

**Chemistry**

Calculate the heat in kilojoules needed to condense 185g of steam at 100 ∘C.

*November 24, 2013*

**6th grade math**

Right, it should be horizontal.... got my lines mixed up.

*November 21, 2013*

**6th grade math**

Forgot to add this question: 1. Describe the graph represented by the table: x 1 2 3 4 y 5 5 5 5 Ans: The actual graph would be a vertical line at ordered pairs (1,5), (2,5), (3,5), (4,5), and (5,). Is this right?

*November 21, 2013*

**6th grade math**

Can you check please: 1. Joe has used 75 sheets of a pack of notebook paper, which is 5/8 of the entire pack. The equation 5/8 s = 75 can be used to find the number of sheets "s" in a full pack. Determine the solution of the equation, and tell what the solution means...

*November 21, 2013*

**6th grade math**

Can you check these, please? 1. A spool contains 18.5 feet of rope. Bob cuts off a piece of rope. There are 13.8 feet of rope left on the spool. Write 3 equations that could used to determine the length of the rope (r) Bob cut off. Ans 1: r + 13.8 = 18.5 Ans 2: 18.5 - r = 13.8...

*November 21, 2013*

**6th grade math**

thanks!

*November 19, 2013*

**6th grade math**

Can you check this problem, please? n/((3/4))=5/9 Ans: multiply both sides by (3/4) n = 5/9 * 3/4 n = 15/36 n = 5/12

*November 19, 2013*

**World History**

During the very late 1800's/very early 1900's.

*November 18, 2013*

**World History**

In chronological order, list the territories and countries Japan took control of in its program of expansion. Please and thank you on any help!

*November 18, 2013*

**math**

x^-1y^0 do you do 1/x*1=1/x and how do you do x^-2y^1\ x^1y^2 ?

*November 18, 2013*

**statistics**

How large a sample would be needed to form a 90% confidence interval for the mean nicotine content of a brand of cigarettes if the nicotine content has a normal distribution with sigma equal to 8.5 mg and the width of the interval (the length of the confidence interval) equal ...

*November 17, 2013*

**math**

x^-1y^0 do you do 1/x*1=1/x

*November 16, 2013*

**Solar Energy**

4)Overall lifetime of the PV system

*November 14, 2013*

**math**

Janise is a sole proprietor owning a small specialty store. the business records show that the cost of the stores individual inventory items have been steadily increasing. the cost of the end of the year inventory is 125,000 and the cost of the beginning of the year inventory ...

*November 13, 2013*

**statistics**

The average gasoline price of one of the major oil companies has been $3.20 per gallon. Because of cost reduction measures, it is believed that there has been a significant reduction in the average price. In order to test this belief, we randomly selected a sample of 36 of the...

*November 12, 2013*

**dynamics**

The answer is not clear! Can you explain ?

*November 10, 2013*

**Chemistry**

I need help I can't seem to get the right answer. Please help! 1/2 H_2 (g) + 1/2 Cl_2 (g) --> HCl (g) -92.3 kJ/mol Na(s) + 1/2 O_2(g) + 1/2H_2(g) --> NaOH(s) -426.8 kJ/mol NaCl(s) --> Na(s) + 1/2Cl_2(g) 411.1 kJ/mol H_2O(l) -->H_2(g) + 1/2O_2(g) 285.8 kJ/mol ...

*November 8, 2013*

**6th grade math**

Can you check this,please? 10−��^0+5(9−��) Ans: 10-x^0+ 45-5x = 10 - 1 + 45 - 5x = 9 + 45 - 5x = 54 - 5x OR 10−��^0+5(9−��) = 10 - x +45-5x = 55-6x?

*November 7, 2013*

**chemistry**

1) What is the chemical formula for the compound formed between thallium(iii) and bromine? 2) What is the chemical formula for the compound formed between thallium(iii) and sulfur? HINT!: each compound wil be neutral. What is the charge of the thallium(iii) ion? What is the ...

*November 7, 2013*

**Math**

360

*November 5, 2013*

**physics**

A jogger is running around a circular track of circumference 340 m. If the jogger has a speed of 11 km/h, what is the magnitude of the centripetal acceleration of the jogger?

*November 4, 2013*

**6th grade math**

Can you check #18 and explain how to do #15 please? 15. Sue ordered 4 pizzas for 6 dollars each and 2 twelve packs of coke for x amount. Use the distributive property to create an equivalent expression. Ans: not sure-seems like they're not related. 6*4=2(12x) 24 =2(12 + x...

*November 4, 2013*

**6th grade math**

Thanks! 18. One person in my class will call 3 people, and each of those people will contact 3 other people, and so on. How many people will be contacted in the 5th round? Write your answer in exponent form and find the value. Ans: 3^5 = 243 Still don't understand #15 ...

*November 1, 2013*

**6th grade math**

Can you check my homework, please? 1. Write numeric expression for "eighteen less than the product of 2 and a". Ans: 2a - 8 2. Molly has x pieces of candy. Holly has twice as much. Write an expression to represent how much candy Holly has. Ans: 2x 3. Jill wrote 6 ...

*November 1, 2013*

**Math**

Why 15 and not another number

*October 29, 2013*

**6th grade math**

Can you check these, please? 1. George had 5 apples. His mother gave him a few more apples to share with his friends. Write an expression to represent the total number of apples George has. Ans: 5 + n 2. four times as much as a number k Ans: 4k 3. Michelle writes 15 pages in ...

*October 29, 2013*

**english comp**

After watching Roy Hargrove play the trumpet, Marcia decided that she wanted to be one.

*October 25, 2013*

**6th grade math**

Oh, okay. Thanks!

*October 24, 2013*

**6th grade math**

Can you check these problems, please? Translate each phrase into algebraic expression. 1. 5 more than D Ans: 5 + D 2. Twice a number W Ans: 2*W 3. Product of 60 and W Ans: 60*W 4. A number, N, decreased by 18 Ans: N - 18 5. 14 minus a number, M Ans: 14 - M 6. Twice a number, C...

*October 24, 2013*

**Geometry**

Find JL if JK=17-x, KL=2x-7, and K is the midpoint of JL

*October 24, 2013*

**6th grade math**

Thanks!

*October 23, 2013*

**6th grade math**

Can you check these, please? Convert each of the following verbal phrases to algebraic expressions. 1.twice the number plus 16 is 18 Ans: 2x + 16 = 18 2.the quotient of a number and ten more than fourteen is eleven Ans: (10 + 14)/x = 11? or x/10 + 14 = 11?

*October 23, 2013*

**physics**

A truck with a mass of 1.5 x 103 kg accelerates to a speed of 18.0 m/s in 12.0 s from a dead stop. Assume that the force of resistance is a constant 400.0 N during the acceleration. What is the average power developed by the truck’s engine?

*October 23, 2013*

**Math**

a girl is three years older than her brother.if their combined age is 35 years,how old is each

*October 22, 2013*

**6th grade math**

Thanks!

*October 22, 2013*

**6th grade math**

Can you check these, please(studying order of operations). 1. Sam bought two CDs for $13 each. Sales tax for both CDs was $3. Write an expression to show how much Sam paid in all. Ans: 13*2+3 2. Alicia made 24 chocolate chip cookies and 36 sugar cookies. Then she divided all ...

*October 22, 2013*

**Compund inequalities**

all real numbers that are less than -3 or greater than or equal to 5 x<-3 or x=>5 x<5 or x=>-3* my answer x<=-3 or x>5 x<=-3 or x<=5

*October 18, 2013*

**quantum physics**

yes say 3a.i wont pass else

*October 18, 2013*

**quantum physics**

help reqd

*October 18, 2013*

**quantum physics**

@anonymous,@stuart @fred,,q3 a of quantum physics of edx,help please

*October 18, 2013*

**quantum physics**

question 3 a ...help pls

*October 18, 2013*

**Solving inequanities**

Write the solution to the inequanity in set builder notation 9t-4>32 t t>4 t t>6* my answer t t>28 t t>36

*October 17, 2013*

**6th grade math**

From Monday..Can you check the following problems, please? 1. If the ratios for microphones to karaoke machines are all equivalent, how can you find the value of x? table: microphones 3 9 15 36 karoke 1 3 x 12 Ans: x=5 (because divide each ratio by 3) 2 There are 32 students ...

*October 16, 2013*

**Math**

never mind I figured it out thanks tho

*October 15, 2013*

**Math**

can you long hand that?

*October 15, 2013*

**Math**

At a 35% off sale. Daniela purchased a dress for $94.64. What was the regular price of the dress. Please give the answer and formula.

*October 15, 2013*

**6th grade math**

I'm reposting again..Can anyone check my answers?

*October 14, 2013*

**6th grade math**

Can you check the following problems, please? 1. If the ratios for microphones to karaoke machines are all equivalent, how can you find the value of x? table: microphones 3 9 15 36 karoke 1 3 x 12 Ans: x=5 (because divide each ratio by 3) 2 There are 32 students in Mr. Santana...

*October 14, 2013*

**Far Rockaway beach**

Why are the far rockaway beach rapids so strong there? *Far Rockaway beach NY*

*October 14, 2013*

**Probability**

A survey of TV viewing habits of 50 men and 50 women found the following information: Of the 50 men, 20 prefer watching baseball and 30 prefer football. Of the 50 women, 25 prefer watching baseball and 25 prefer football. Construct a data table for this data and answer this ...

*October 12, 2013*

**Survey Math**

A survey of 240 10th grade students in a local High School found that there were 140 girls and 100 boys in the grade. Of the 140 girls, 100 preferred gym class while 40 preferred art class. Of the 100 boys, 40 preferred gym class while 60 preferred art class. Construct a data ...

*October 12, 2013*

**Math Probabilities**

A survey of TV viewing habits of 50 men and 50 women found the following information: Of the 50 men, 20 prefer watching baseball and 30 prefer football. Of the 50 women, 25 prefer watching baseball and 25 prefer football. Construct a data table for this data and answer this ...

*October 12, 2013*

**Math**

The probability of pulling a heart or a red card from a deck of cards is?

*October 12, 2013*

**Card Probability**

The probability of pulling an ace or king from a deck of cards is?

*October 12, 2013*

**AP Chemistry**

This may be a little late but what about moles

*October 11, 2013*

**plss answer fast math algebra**

the ratio of the complement of an angle to the supplement is 1:7.Find the angle.

*October 11, 2013*

**Fluid Mechanics**

Consider the 2D, incompressible, steady flow between parallel walls, the bottom wall is stationary and the top one is moving at a constant velocity Uw. The pressure is constant. Assuming the flow is fully developed (i.e. independent of x), we can write ∂/∂x≡0...

*October 11, 2013*

**6th grade math**

thanks!!

*October 9, 2013*

**6th grade math**

I'm not sure how to solve this problem using unit rate. Jonathan is baking several boxes of bread. He used 9cups of water to 12 cups of flour. How much water was used per cup of flour? Ans: 9cups water/12cups flour = 3/4 cups water --is the problem solved by acutally ...

*October 9, 2013*

**6th grade math**

Thanks!! Yes, this helps.

*October 8, 2013*

**6th grade math**

Can you check these percent proportion problems? 1. 50 students got pizza at lunch. 20% of those got chocolate milk. How many students got chocolate milk? 50/n = 20/100 20n = 100*50 20n = 5000 n = 5000/20 n = 250 students 2. Mr. Ford has 45 fish in his aquarium. What is the ...

*October 8, 2013*

**6th grade math**

Hi.. i'm a little confused on using proprtion equations to solve percent problem. can you check the following? Is there a different way to solve? equation: is(part)/of(whatnumber)= %/100 1. What is 94% of 43? x/43 = 94/100 100x = 43*94 (cross multiply) 100x = 4042 x = 4042...

*October 8, 2013*

**chemistry**

5.51¡Á105 quads

*October 7, 2013*

**Math help**

Eric and Mark went to a ball game and visited the concession stand. They each got a hot dog, and mark got a large soda and a bag of peanuts. Eric had a coupon for 3$ off the cost. Mark Paid for the rest, which came to 11.50. Peanuts cost 4$, and a hotdog costs 3.50. What is ...

*October 7, 2013*

**Linear Equation**

is it 2?

*October 6, 2013*

**Linear Equation**

solve for x -6x+12=-13x+10 x= -2 x= -2/7 x= -2/19 x= 2/7 I have no I idea how to answer this question. Can you give me an explanation with the answer? Thank you

*October 6, 2013*

**6th Grade Math**

Thanks!!!

*October 5, 2013*

**6th Grade Math**

Thanks again!! Last question, promise (at least for today :-).. Forgot to include this one: A 3lb pork loin can be cut into 10 pork chops of equal weight. How many ounces in each pork chop? 1 lb = 16oz (unit ratio 16oz/1lb) 3lbs x 16oz/1lb = 48 oz = 48oz/10 pork chops = 4.8oz/...

*October 5, 2013*

**6th Grade Math**

Thanks! Can you also check these? 1. Convert 18ft to yards 3ft = 1yd (unit ratio 1yd/3ft) 18ft x 1yd/3ft = 18/3 yd = 6 yds 2. Convert 2lb to ounces 1 lb = 16 oz (unit ratio 16oz/1lb) 2 lb x 16oz/1 lb = 32 oz. 3. Convert 2miles to feet 1 mi = 5280 ft (unit ratio 5280ft/1mi) = ...

*October 5, 2013*

**6th Grade Math**

Can you check my answers please? 1. Convert 2 and 3/4 qts to pints. 1 qt = 2 pints (unit ratio = 2/1) 2 and 3/4 x 2/1 = 9/4 x 2/1 = 22/4 = 5 and 1/2 pints 2. A 40-foot power boat is for sale. How long is the boat to the nearest yard? 1 ft = 3yds (unit ratio = 1/3) 40 x 1/3 = ...

*October 5, 2013*

**Biography**

How do I start my biography? I am writing about my sister, but I don't know how to start.

*October 5, 2013*

**math**

Alaska has 18 national parks. If you add zero to that number, you get the number of national parks in Virginia. How many national parks are in Virginia ? How do you know ?

*October 3, 2013*

**Calculus**

Thanks a lot Steve!

*October 3, 2013*

**Calculus**

Use the linear approximation (1+x)^k\approx 1+kx to find an approximation for the function f(x) for values of x near zero. I need help for (3+3x)^(1/3). Please help me!

*October 3, 2013*

**6th grade grammar**

Thanks again Ms. Sue!! (sorry about answer typo in #20 - 2nd phrase isn't in the sentence)

*October 1, 2013*

**6th grade grammar**

Thanks Ms. Sue!! You mentioned that there was another phrase for #2 (We were looking for the documents that were hidden under the generator.). But, I don't see it. Also, can you check these 2? 18. I kicked out the vent and we jumped from the shaft into a dumpster filled ...

*October 1, 2013*

**6th grade grammar**

I'm getting confused on finding prepositional phrases. Can you check my homework, please? Directions: Put a 'P' above the preposition. Circle object of preposition. Put a 'M' above any modifiers. Put () around prepositional phrase. 1. After we cut the fence...

*October 1, 2013*

**physics**

Kim is in a boat traveling 3.8 m/s straight across a river 240 m wide. The river is flowing at 1.6 m/s. What is Kim's resultant velocity?

*October 1, 2013*

**physics**

A driver in a car traveling at a speed of 70 km/h sees a cat 129 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 125 m? answer in units of s

*September 30, 2013*

**physics**

A driver in a car traveling at a speed of 70 km/h sees a cat 129 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 125 m? answer in units of s

*September 30, 2013*

**Dice Probability**

What is the probability of rolling two number cubes and having the first cube land on 2 and the second cube land on 3? I got 2/6 * 3/6 = 6/36 which becomes 1/6 1/6 probability is my answer correct?

*September 30, 2013*

**Card Probability**

When drawing a card from a deck, the P(face card and red) is:

*September 30, 2013*

**Probability With Cards**

When drawing a card from a deck, the P(king and hearts) is:

*September 30, 2013*