# Posts by Alex

Total # Posts: 3,749

**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 ?

**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 ...

**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 ...

**Math**

360

**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 ...

**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 ...

**Math**

Why 15 and not another number

**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 ...

**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?

**Math**

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

**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 ...

**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 ...

**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 ...

**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 ...

**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?

**AP Chemistry**

This may be a little late but what about moles

**plss answer fast math algebra**

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

**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 ...

**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 ...

**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...

**chemistry**

5.51¡Á105 quads

**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 ...

**math**

25

**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) = ...

**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 = ...

**Biography**

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

**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 ?

**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 ...

**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 :)

**Math**

There are 45 candies in a bowl, 20 red and 25 yellow. If two are taken from the bowl, what is the probability they will be two red candies? here is what I have but I need help with the rest or even knowing if I am right. 20/45 25/43 25 * 20 = 500 45 * 43 = 1935 0.25839 is decimal

**Probability Math**

Event A has probability of 0.2 and event B has probability of 0.3. If they are independent, what is the probability that both of them happen? I can't remember how to do this one.

**Math**

A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Three cards are pulled in order from this deck of 52 playing cards. What is the probability that the cards ...

**Math Probabilities**

A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Two cards are pulled in order from this deck of 52 playing cards. What is the probability that the cards will...

**Probability Math**

The probability of a red candy being selected from a bowl is 0.2, and the probability of a pink frosted animal cookie being taken out of a different bowl is 0.4. What is the probability of getting both a red candy and a pink cookie?

**Math**

A standard deck of cards contains 52 cards. Of these cards there are 13 of each type of suit (hearts, spades, clubs, diamonds) and 4 of each type of rank (A – K). Two cards are drawn from the deck and replaced each time back into the deck. What is the probability of ...

**Math!**

The last one was wrong.

**Reading Help**

Ya girl,shake that booty

**Reading Help**

Ok I get it now thank you Ms. Sue

**Reading Help**

Think about the rites of passage that individuals confront in the following literature The bass, the river, and Shelia Mant by W.D Wetherell Oranges by gary Soto I have no idea what im supposed to do here. Please help me.

**Reading Help**

In hanging fire the recurring line "and momma's in the bedroom with the door closed" creates a feeling of Confidence Connection Isolation Poverty Is it Isolation?

**Reading The Scarlet Ibis help**

Ok I Read the story Is it the Narrator?

**Reading The Scarlet Ibis help**

The only character who believed in doodle throughout the story of the Scarlet Ibis was Daddy Mama Aunt Nicey The narrator Is it Aunt Nicey?

**physics**

what is the magnitude of the average acceleration of a skier who starting from rest, reaches a speed of 8.0 m/s when going down a slope for 5.0 sec? how far does the skier travel in this time?

**Geometry**

Just remember to take the area of the bottom of the cylinder and then multiply it by the height of the cylinder. This is the formula for the volume of the cylinder: V=π(r^2)h Just substitute the info given into this equation. r= 1.2 cm h= 5.3 cm so V= π(1.2^2)(5.3) ...

**expression help**

which is the sum or difference is equivalent to the following expression 3x-2/9 *fraction*

**Property help**

Its accociative property of multiplication

**Property help**

what property is this? (3z)xy=3(zx)y is it a communative property of addition? if not what is it? thank you

**Expression**

(4/7)^3 *fraction* I have never done this kind of expression before. Answer 343/64 21,952 407 64/343 Is it A?

**Expression Help**

Thank you

**Expression Help**

is it C?

**Expression Help**

so it is C or D

**Expression Help**

a negative

**Expression Help**

Can you help me Ms. Sue?

**Expression Help**

simplify the following expression 1/4 *fraction* (24-16x) Answers 6+4x 6+4 6-4x 6-4 Is it A?

**Art**

if you have any comic books you can write an outline of the bear.

**Expressions help**

THANK YOU MS SUE!

**Expressions help**

please help I have been stuck on this question for the longest

**Expressions help**

I have no idea on how to do this equation please help me. What is the simplified form of the following expression 2x^2y+3x^2+4y+3x^2y+2y possible answers 1.)5x^4y^2+3x^2 2.)8x^2y+6y^2 3.)5x^2y+3x^2+6y 4.)14x^2y Is it 3?