Friday
April 18, 2014

Posts by Alex


Total # Posts: 2,498

science
all of the following are explanations for glacial periods EXCEPT. a. varying solar energy b. volcanism c. biological organisms d. Earth's orbit's precession

World History
What is the connection between Czar Nicholas II, mobilization, and WWI? Any help would be great, thank you in advance!

World History
Why was Serbia’s fight for independence a key to WWI? Any help is appreciated, as I'm studying for a test and making flash cards. Please and thank you!

US History
Evaluate the evidence presented by Rice and Rockefeller. What light do they shed on the Robber Baron Industrial Statesman debate? I can't find the answer in my book, so any help is appreciated. Please and thank you!

math
Rewrite the equation 4x + y + 2 = 0 in slope-intercept form.

US History
Describe the deal the South Improvement Company made with the railroads and the advantages offered Standard Oil as well as the railroads. Can't find the answer anywhere in the packet that I was given. Any help would be appreciated, please and thank you!

Physics
Someone please answer i need help and do not understand

Physics
A 6 kg block free to move on a horizontal, frictionless surface is attached to a spring. The spring is compressed 0.16 m from equi- librium and released. The speed of the block is 1.44 m/s when it passes the equilibrium po- sition of the spring. The same experiment is now repe...

Physics
Someone please answer i need help and do not understand

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 Choo...

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

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

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!

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

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

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

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

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

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

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

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?

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"

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 apartm...

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

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

6th grade math
Right, it should be horizontal.... got my lines mixed up.

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?

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...

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...

6th grade math
thanks!

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

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

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!

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

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 ...

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

Solar Energy
4)Overall lifetime of the PV system

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 ...

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...

dynamics
The answer is not clear! Can you explain ?

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?

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 ch...

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?

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)...

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 thou...

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 let...

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 h...

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

6th grade math
Oh, okay. Thanks!

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...

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

6th grade math
Thanks!

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?

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?

6th grade math
Thanks!

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 t...

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

quantum physics
yes say 3a.i wont pass else

quantum physics
help reqd

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

quantum physics
question 3 a ...help pls

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

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 i...

Math
never mind I figured it out thanks tho

Math
can you long hand that?

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.

6th grade math
I'm reposting again..Can anyone check my answers?

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...

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

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 qu...

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 ...

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 qu...

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

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

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...

6th grade math
thanks!!

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 divid...

6th grade math
Thanks!! Yes, this helps.

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 nu...

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...

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 th...

Linear Equation
is it 2?

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

6th Grade Math
Thanks!!!

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/...

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) = 2...

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 = 4...

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

Calculus
Thanks a lot Steve!

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!

6th grade grammar
Thanks again Ms. Sue!! (sorry about answer typo in #20 - 2nd phrase isn't in the sentence)

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 wi...

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...

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?

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

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

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?

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

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

Math Probabilities
P(A or B) = P(A) + P(B) − P(A and B) when 1. A and B are mutually exclusive 2. A and B are complements 3. A and B occur together 4. A and B are dependent I am pretty confused on this one help will be great :)

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