Wednesday

May 27, 2015

May 27, 2015

Total # Posts: 1,262

**combinatorics**

10 red, 10 blue, 10 green matches are used to build a regular icosahedron, how many possible solutions are there?
*May 24, 2015*

**combinatorics**

For the 6 faces and 8 vertices of a regular hexahedron, respectively sealed with red and blue these 2 beads (each face contains a bead and each vertex contains a bead), how many different types of solutions are there?
*May 24, 2015*

**combinatorics**

There are 4 kinds of colored beads( r, g, b, y) to seal onto the 6 vertices of a regular hexagon, how many solutions are there?
*May 24, 2015*

**combinatorics**

Use 3 types of colored beads to seal onto the vertices of a regular pentagon, how many possible solutions are there? Hint: The bead is a full round bead
*May 24, 2015*

**combinatorics**

Paint the 4 faces of a regular tetrahedron by using 3 types of colors, how many possible solutions are there?
*May 24, 2015*

**Combinatorics **

We have two kind of tiles : 1 x 1 and 2 x 2, and use them to cover the 8 x 3 road without overlapping, how many different ways to arrange tiles there?
*May 24, 2015*

**combinatorics. **

Suppose a manufacturer produces the football as shown below, they want to print one 2014 football World Cup logo and one Brazilian flag on it, note there are only two signs totally. These two signs are printed in two polygons. If we do not consider the position and direction ...
*May 24, 2015*

**Combinatorics**

6x 35= 210
*May 23, 2015*

**Social Studies**

Extended Response 1. How are the cultures in South America like the cultures in Mexico? How are they different? 2. How might the cultures of Latin America be different if the Spanish and Portuguese had never arrived? What kind of culture do you think would dominate the region ...
*May 14, 2015*

**Social Studies**

Are those a shortage of housing and potatoes?
*May 14, 2015*

**Social Studies**

Please check my answers??? 4. Trade and travel among the regions of South America have been affected by a. natural resources and vegetation b. high mountains and dense rain forests (I picked this) c. the Caribbean Sea and the Pacific Ocean d. Argentina and Venezuela's ...
*May 14, 2015*

**English**

1. MLA formatting requires which of the following? A. double spacing throughout, including the Works Cited page B. half-inch margins C. a title page D. paragraphs indented one inch 2. In MLA, parenthetical references _______. A. are optional and may be interchanged with ...
*May 1, 2015*

**Math**

Small cubes with edge lengths of 1/4 inch will be packed into the right rectangular prism. How many small cubes are needed to completely fill the right rectangular prism? The height is 3 3/4 inches, the width is 5 inches, length is 4 1/2 inches. ( the small cubes will be 1/4 ...
*April 30, 2015*

**Math**

6 and 8 6+6=12 8+8=16 12+16=28 perimeter also 6 x 8= 48 area
*April 29, 2015*

**math**

The graph of a second-order polynomial is shown below, and the intercepts with the axes are marked. Explain how you can use the graph to write the polynomial as a product of linear factors (x-a)(x-b). Be sure to state the values of a and b.
*April 29, 2015*

**Math**

Identify all sums, products, and factors in the expression (x+5)(y+9) +(2+x)(y+23)
*April 27, 2015*

**Math**

The plane P1 has equation r = (2,1,1)+lambda(-2,1,8)+mu(1,-3,-9) The plane P2 has equation r = (2,0,1)+s(1,2,1)+t(1,1,1) Show that for points that lie on P1 and P2, lambda=mu I have no idea how to start... help! Thanks!
*April 25, 2015*

**math**

On a 3 day hike, Robert hiked twice as many miles on the first day as on the second day. On the third day he hiked 5 miles. Carlos hiked 5 miles on the first day and three times as many miles as on the second day as on the third day. (a) Write and simplify an expression for ...
*April 22, 2015*

**math**

It was a typo. It should have said Robert instead of Matt. Please help me
*April 22, 2015*

**math**

On a three day hike, Robert hiked twice as many miles on the first day as on the second day. On the third day he hiked 5 miles. Carlos hiked 5 miles on the first day and three times as many miles on the second day as on the third day. (a) Write and simplify an expression for ...
*April 22, 2015*

**math**

Sharon wants to buy a bike helmet that costs $21. She already has $9 saved. She plans to sell lemonade to earn enough money to buy the bike helmet. For each cup of lemonade she sells, she makes a profit of $0.20. Explain how to determine how many cups of lemonade she must sell...
*April 22, 2015*

**statistics**

A two-tailed test is conducted at the 0.10 significance level. What is the P-value required to reject the null hypothesis? A. Greater than or equal to .010 B. Greater than or equal to 0.05 C. Less than or equal to 0.10 D. Less than or equal to 0.05 Is it C?
*April 18, 2015*

**math**

I will let her know first thing Monday morning. Thanks
*April 18, 2015*

**math**

Sarah was trying to figure out her grades for her math course. She only knew the grade of 4 tests she had taken, however the class had taken 5 tests total. She scored a 94, 67, 83 and 93. If Sarah ended up with a grade of 90, what did she get on the 5th and final test?
*April 18, 2015*

**Math**

Is there a shorter way to solve this problem than the equation that was given.
*April 18, 2015*

**Math **

School A has 480 students and 16 classrooms, School B has 192 students and 12 classrooms. How many students would have to transfer from School A to School B for the ratios of students to classrooms at both schools to be the same? Explain your answer.
*April 18, 2015*

**Math**

An artist drew a painting with similar rectangles with whole-number dimensions in inches. The small rectangle is 8 inches by 3 inches. One dimension of the medium rectangle is 9 inches. One dimension of the large rectangle is 32 inches. a. find the dimensions of the medium ...
*April 18, 2015*

**Physics**

A clown at a birthday party has brought along a helium cylinder, with which he intends to fill balloons. When full, each balloon contains 0.00410 m3 of helium at an absolute pressure of 1.30 x 105 Pa. The cylinder contains helium at an absolute pressure of 2.40 x 107 Pa and ...
*April 18, 2015*

**Math**

An artist drew a painting with similar rectangles with whole- number dimensions in inches. the small rectangle is 8 inches by 3 inches. One dimension of the medium rectangle is 9 inches. One dimension of the large rectangle is 32 inches. A. find the dimensions of the medium ...
*April 17, 2015*

**Math**

School A has 480 students and 16 classrooms. School b has 192 students and 12 classrooms. A. what is the ratio of students to classrooms at School A? 480:16 B. what is the ratio of students to classrooms at School B? 192:12 C. How many students would have to transfer from ...
*April 17, 2015*

**English**

1. A research paper has which of the following aspects in common with an essay? A. a title page B. a works cited list C. body paragraphs with topic sentences D. personal experience as a primary source 2. When citing all sources, which answer lists the items that must be ...
*April 17, 2015*

**English**

1. When taking notes from your sources, you should also ________. A. revise your research question B. write the information needed for your works cited list C. format your paper and works cited list D. find a topic for your research paper 2. Academic writing involves which of ...
*April 17, 2015*

**math**

given the equation -3x +2y =4, Write another equation that will form a linear system with: one solution, no solution and infinite solution. infinite solution: (-3x +2y =) * 3 -> -9x +6y =12 y=3/2x+4 -9x +6y =12 I think we have to multiple the first equation by non-zero ...
*April 16, 2015*

**math -check**

Thank you =) =I will try to search about it, how to write these window setting for graphing.
*April 15, 2015*

**math -check**

given the equation -3x +2y =4, Write another equation that will form a linear system with: one solution, no solution and infinite solution. Graph the linear using graphing calculator and write your window setting in the format x: Xmin, xmax, Xscl. Y: Ymin, Ymax, Yscl Please ...
*April 15, 2015*

**math**

Given the equation - 3x +2y =4. Write another linear equation that will form a linear system with exactly one solution? I usually try to answer b4 i ask question But this time i'm really stuck. plz help ?
*April 15, 2015*

**Math**

If 3 bricks weigh 9 pounds, 5 bricks weigh 15 pounds, and 8 bricks weigh 24 pounds, write an equation for the function and explain your variable choices. How do I do this?
*April 13, 2015*

**Math**

Cho is driving a car. He gets to his destination, which is 72 miles away, in 1 hour and 30 minutes. a. The equation d=rt can be used to model Cho's drive, where d us the distance traveled, r is the speed of the car and, and t is the amount of time spent traveling. ...
*April 13, 2015*

**Math**

Rayshawn must run at least 15 miles per week. Write an inequality that represents the number of miles that Rayshawn must run. Would it be M < 15. _
*April 13, 2015*

**Math**

Patrice cuts a piece of board 4 feet long from a board that is x feet long. Find an expression that describes the length in feet of the original after the cut. a. 4 + x b. 4x c. 4 - x d. x - 4 I pick d, is that the correct answer?
*April 13, 2015*

**Physics**

In exercising, a weight lifter loses 0.236 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. The work done in lifting weights is 1.41 x 105 J. (a) Assuming that the latent heat of vaporization of perspiration is...
*April 12, 2015*

**math**

which ordered pair is a solution to the equation y = 3x + 4. I just can't figure it out. I have been working on this problem for over an hour. Please help me with the steps
*April 11, 2015*

**Math**

Gloria is an artist. She sets a goal to paint 2 pieces every month. she has already painted 5 pieces. The number of pieces Gloria paints depends on the number of months she spends painting. Which statements describe the number of pieces p Gloria paints over t months if she ...
*April 10, 2015*

**Math**

yes 7/8 and 27/32
*April 10, 2015*

**Math**

Jack needs a piece of wood at least 13/16 inch long for some detail work on a project he is working on. Which of the following lengths of wood would meet his requirements? a 1/2 inch b 7/8 inch c 3/4 inch d 27/32 inch e 5/8 inch f 1/4 inch How do I solve this problem?
*April 10, 2015*

**Math**

How would I work this problem to get the answer? y = 3 (0) + x y = 0 + x y = 0
*April 10, 2015*

**Math **

What ordered pair is a solution to the equation y = 3x + 4? a. (0,0) b. (-5, -3) c. (2, 10) d. (15, 39) I pick C is this correct?
*April 10, 2015*

**Math**

Does the inequality x > 5 have an infinite number of solutions? How do you know?
*April 10, 2015*

**Math**

Yes it is multiple choice
*April 10, 2015*

**Math**

Which inequalities share some solutions with x > 3? - a x > 3 b x < 0 c x < 3 _ d x > 5 _ e x < 3 How do I solve this problem?
*April 10, 2015*

**math**

Consider the inequality x > , where x is a positive real number. Does the inequality have an infinite number of solutions? How do you know? Pease help me.
*April 9, 2015*

**math**

The value of n is less than 20. Write the inequality that represents the value of n. I think I can graph it on the number line if I new what n was.
*April 9, 2015*

**math**

There are 32 visitors to the guidance counselor's office each day. Write an inequality that represents the number of visitors to the guidance counselor's office. I am so confused
*April 9, 2015*

**math**

The manager at Sunshine Days Camp is going to buy juice for the campers. Each bottle contains 64 ounces of juice. Each camper is expected to drink more than 11 ounces of juice. There are 72 campers. Explain how the manager would write an inequality to represent the number of ...
*April 9, 2015*

**math**

The manager at Sunshine Days Camp is going to buy juice for the campers. Each bottle contains 64 ounces of juice. Each camper is expected to drink more than 11 ounces of juice. There are 72 campers. (a)Explain how the manager would write an inequality to represent the number ...
*April 9, 2015*

**math **

what are some inequalities that share some solutions with x is greater than or equal to 3? I am not sure what they are.
*April 9, 2015*

**math**

what is the procedure for solving the equation 1/2x = 16. I am stuck. Please help me.
*April 9, 2015*

**Algebra: Quadratic Functions**

Maximum height: 16ft Time to reach that height: 1 second Time in the air: 2 seconds Highest distance from trampoline: 4ft SAME PERSON WHO ASKED QUESTION
*April 8, 2015*

**Algebra: Quadratic Functions**

The height of an acrobat who jumps from a trampoline 2 feet in the air is modeled by the function: y = -16x^2 + 16x + 12, where x is the time in the seconds after the acrobat jumps. 1: Find the maximum height of the acrobat. 2: Find how long it takes to reach that height. 3: ...
*April 8, 2015*

**Algebra: Quadratic Functions**

When the rocket will reach max height: 1/14 seconds Maximum height: 7.918... Feet BY SAME PERSON WHO ASKED QUESTION
*April 8, 2015*

**Algebra: Quadratic Functions**

NOT AM ACTUAL ANSWER. THIS IS BY THE SAME PERSON. IMPORTANT SIDE NOTE: the -16t is squared.
*April 8, 2015*

**Algebra: Quadratic Functions**

if a rocket is launched straight up into the air with an initial velocity of 112 feet per second, it's height after t seconds is given by the formula h = 112t - 16t, where x represents the height of the rocket in feet: A. When will the rocket reach it's maximum height ...
*April 8, 2015*

**Math**

Solve the equation. Choose the answer in simplest form. 4x = 8/7 a. 1/28 b. 1/7 c. 2/7 d. 7/2 Would the correct answer be b.
*April 8, 2015*

**Algebra**

What is the equation of the line that passes through (-6,-2) and is parallel it the line with the equation x=4
*April 8, 2015*

**Algebra**

How many musicians are there in an orchestra if 24 violinists represent 15% of all musicians?
*April 8, 2015*

**math**

The cost of a student ticket to the school play is $7. Write an equation that correctly relates the cost, c, for a particular number of student tickets, s, purchased. Identify the independent and dependent variables.
*April 8, 2015*

**science**

1. What do bone marrow and the epidermis have in common? A. They are both sites of new cell formation. B. They both contain structures that assist the body in cooling down if overheating occurs. C. They both contain or are associated with sensory neurons. D.They are both ...
*April 8, 2015*

**Math**

You are working as an assistant to a chef. The chef has 6 cups of berries and will use 2/3 cup of berries for each dessert he makes. How many desserts can he make? Where do I start to solve this problem?
*April 7, 2015*

**English**

1. In formal writing, abbreviations ________. A. can be used sparingly B. should never be used C. can be used depending on the instructor's preference D. can be used depending on the discipline 2. A paragraph contrasting two teachers in which the first half of the ...
*April 2, 2015*

**variation**

T varies inversely as R and T =3.5 when R =10
*April 2, 2015*

**English**

1. The basis is another word for ________. A. the overall thesis of the essay B. selecting categories C. the order of classification D. guidelines provided by a professor
*March 27, 2015*

**English**

Would 2 be A? Sorry, im really not sure to be honest.
*March 27, 2015*

**English**

1. Choose the letter of the one sentence in which quotations and underlining are correctly used. A. I hope, commented Josh, that I do well enough to make it to the final race. B. "I hope," commented Josh, "that I do well enough to make it to the final race."...
*March 27, 2015*

**Business **

14. When you first started your new business, you were so excited about the large volume of orders you had. One year later, you find that your orders are less than half of what they were in the beginning. What is the most probably cause of this decrease in order? A. You'...
*March 26, 2015*

**Business**

Oh ok I'm get it now
*March 26, 2015*

**Business**

19. The price for predictability is often A. long hours. B. long-term boredom. C. stress and insecurity. D. increased self-confidence. I think D or a
*March 26, 2015*

**Business**

Okay thank you!!
*March 26, 2015*

**Business **

12. You start a new business selling a product that's the best of its kind on the market. In addition to this product, what must you have to be successful? A. Good marketing B. Sales experience C. A large staff D. A franchise license I think b or a
*March 26, 2015*

**algebra**

Show how you would solve by Substitution: 2x + y = 0 x – 3y = -7 Show how you would solve by Elimination: 3x + 4y = 1 5x – 3y = 21
*March 26, 2015*

**algebraic expression**

three times the number N less 13the number M
*March 25, 2015*

**business**

It was D
*March 25, 2015*

**business**

Okay thanks
*March 25, 2015*

**business**

1. What percentage of new businesses fail in the first year? A. 40 percent B. 60 percent C. 25 percent D. 75 percent I think it's A. But not sure
*March 25, 2015*

**statistics**

'Usa today reported on the results of an opinion poll in which 63% of adults said they would sleep if they were sick. 18% said they would watch t.v The poll included poll of 1,000 respondents. Construct a 90% confidence interval for the true percentage of adults who would ...
*March 20, 2015*

**science**

Which statement is true regarding nuclear energy
*March 20, 2015*

**maths financial**

Brenda takes out a twenty year loan of R400,000..she repays the loan by means of equal montly payments starting one month after the granting of the loan.the interest rate is 16% per annum compounded montly. calculate the montly instalments.
*March 19, 2015*

**Geometry **

Prove that any altitude of a triangle must be less than the semiperimeter.
*March 16, 2015*

**math**

write an equation of a circle with the given center and radius. center (–7 –3) and radius 13
*March 15, 2015*

**physics**

A student, 90.0 m away from the foot of a cliff, claps her hands and hears the echo 0.50 s later. Calculate the speed of sound in the air.
*March 6, 2015*

**Physics**

a man sets his watch at noon by the sound of a factory whistle 4.8 km away. If the temperature of the air is 20 degrees C, how many seconds slow will his watch be?
*March 5, 2015*

**math**

A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?
*March 4, 2015*

**math**

A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?
*March 4, 2015*

**math**

A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?
*March 3, 2015*

**maths**

A number of circles touch each ather. The area of the smallest circle is 4n cm^2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?
*March 3, 2015*

**science**

If an object is thrown 60m into the air and it takes the object 6s to get there what's there average speed of the object
*February 28, 2015*

**English**

I believe it is B and then C? 1. Examples in writing ________. A. help you concisely tell a reader a story that makes a point B. provide specific illustrations and instances C. help you show your reader what you see, hear, smell, touch or taste D. include sense impressions, ...
*February 27, 2015*

**English**

Im going to post a few i want to check over. I think it is B, C, and A 1. In narration, dialogue should ________. A. be used solely to describe conflict B. be used sparingly and at significant moments C. be used in each paragraph D not be used at all 2. Which event would BEST ...
*February 27, 2015*

**English**

D? Dialogue
*February 27, 2015*

**English**

A successful narrative essay de-emphasizes or omits ________. A. the thesis statement B. unimportant details C. conflict D. dialogue Is it B?
*February 27, 2015*

**maths**

If 3•5/9 and 40•1/2 are the 1st and last term of geometric sequence. Determine the value of fifth term if there are seven terms.
*February 26, 2015*