Monday

April 21, 2014

April 21, 2014

Total # Posts: 243

**Chemistry**

Write the balanced net ionic equations for the reactions of the halogens with copper metal. The halogens are oxidizing agents and the copper metal is a reducing agent. a) Bromine (Br2)+copper metal (Cu) b) Iodine (I2) + copper metal (Cu) Based on your observations and knowledg...

**math**

What is 8% of 15?

**Math Polygons**

I am a closed shape made of 6 line segments. I have 2 angles less than a right angle and no right angles. What shape am I? Draw an example in the workspace.

**Chemistry**

a solution is prepared by dissolving 22.0g of NaOH in 117.0g of water. The NaOH solution has a density of 1.15 g/mL. what is the Molarity(M) of the solution.

**ALGEBRA! URGENT.**

1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode and the median of the ...

**Math Help? Check my answers.**

Ms. Sue? Can you help me with this?

**Math Help? Check my answers.**

Help please! :)

**Math Help? Check my answers.**

1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode and the median of the ...

**life orientation**

identify three study fields/career paths in order of preference and provide two reasons for each choice

**Molecular cell Biology**

The following chemicals have the indicated formula weights:Sucrose-342.3,Potassium dihydrogen phosphate(KH2PO40-136.09,Tris -121.14.You also have the following solutions made:20%SDS,5M NaCl,500mM EDTA.You have a 40%glycerol solution and 10X TBE.List the steps to make the follo...

**Math**

If you can buy three raffle tickets for $5, how many tickets can you buy for $55? I need to know to different ways to solve this problem...

**physics**

I am having a really hard time figuring this question out, would somebody be able to help me? Imagine a giant dry-cleaner's bag full of air at a temperature of -35∘C floating like a balloon with a string hanging from it 12km above the ground. Estimate what its temper...

**PreCalculus**

Could someone check these? I'm finding the magnitude for 5 and 6. 5. v=3i+j My magnitude is 3.16 6. v=2i+3j My magnitude is 3.61 For 22 and 23 I'm finding each specified vector or scalar. u=2i-5j, v=-3i+7j, w=-i-6j 22. v+w answer: -4i+j 23. u-v answer: 5i-13j

**PreCalculus**

I'm having trouble with these problems.. Could someone please explain how to find the domain of either of these functions? 3. f(x) =(x-2)/(x^2+6x+8) 7. g(x)= sqrt[(9)/(x+3)]

**English**

Jane Eyre. And I was leaning towards B because when I think of gothic elements I think of words like demonic, fiery, passion/love, mystery...

**English**

Which of the following is NOT a Gothic element in this novel? A. the low, demonic laugh in the hall at midnight B. strange laughter in a hidden, upstairs room C. the mysterious fire in Rochester’s bedroom D. the young Jane’s growing love for the older, moody Rocheste...

**Pre-Calculus**

I'm having trouble with this problem because I'm not sure what to do with the 1.. 21. (x-5)^2+(y+2)^2=1 (x-(5))^2+(y+2)^2= ???? center= (5,2) radius= ???

**Pre-Calculus**

I'm currently working with parabolas, and I'm not sure if I am doing this specific problem correctly.. 12. x= y^2-6y+6 y= -b/2a = 6/2(1)= 6/2= 3 x= (3)^2+6(3)+6 x= 33 y=3 (33,3) <--- what I graphed

**Pre-Calculus**

45. log b sqrt 7x 46. log b sqrt (3/y) Could someone please explain these?

**Pre-Calculus**

My book doesn't explain how to do these problems.. The examples they tell me to refer to have no relevance whatsoever. Any help would be appreciated. Use the power property to rewrite each expression. 17. log_3(x)^2 18. log_2(x)^5 19. log_4(5)^-1 20. log_6(7)^-2

**Pre-Calculus**

Thank you

**Pre-Calculus**

Could someone check my answers? 25. 32^(2x-3)=2 Answer- x= 8/5 26. 9^(2x+1)=81 Answer- x= 1/2 27. 1/4=2^3x Answer- x= -2/3 28. 1/27=3^2x Answer- x= -3/2 29. 9^x=27 Answer- x= 3/2 30. 32^x=4 Answer- x= 2/5 31. 27^(x+1)=9 Answer- x= 1/2 32. 125^(x-2)=25 Answer- x= 7/2 33. 81^(x-...

**Pre-Calculus**

I'm having problems understanding how to do these problems. 25. 32^(2x-3)=2 27. 1/4= 2^3x 29. 9^x=27 33. 81^(x-1)= 27^2x

**World Geography**

Cultures often develop along with science and ____________.

**Pre-Calculus**

Thank you for your help

**Pre-Calculus**

Could someone check my answers? 27. (16/9)^2/3 = 64/27 28. (49/25)^3/2 = 343/125 31. (-64)^2/3 = 8 32. (-8)^-4/3 = 1/16 or -1/16

**Excel**

Which option must be selected for all sheets within a workbook to be printed?

**Pre-Calculus**

Thank you both!

**Pre-Calculus**

I'm having trouble understanding how to do complex fractions.. My book doesn't explain it very well.. 12. (x+3/12)/(4x-5/15) 14. (2/x^2 + 1/x)/(4/x^2 - 1/x) 16. (1/y + 3/y^2)/(y + 27/y^2) If you could please explain how to begin the process I would appreciate it.

**World Geography**

For ques. #2 i have (b) is that correct Ms Sue?

**Math**

I have some white and black marbles in a box. There are 30 white marbles. There are 14 more white marbles than black marbles. How many black marbles do I have?

**Physics**

Nicole throws a ball straight up.Chad watches the ball from a window 5meters above the point where Nicole released it . The ball passes Chad on the on the way up, and it has a speed of 10m/s as it passes him on the way back down.Determine how fast Nicole threw the ball upwards

**trig**

An airplane pilot wishes to maintain a true course in the direction 250° with a ground speed of 400 mi/hr when the wind is blowing directly north at 60 mi/hr. Approximate the required airspeed and compass heading

**Math**

Gertrude and Ernest received their typing results. The results are normal and are shown below. Types Of Errors per Page Gertude - (Mean) 10 Standard Deviation- 1 Ernest - (Mean) 10 Standard Deviation- 4 Which statement is true? A. Gertrude probably has more pages with exactly ...

**Math**

Susan owns a chocolate store. She sells her chocolate by the gram and needs to compare the weights of two chocolate batches. She randomly selects 100 pieces from each batch. The distrubition of both samples are normal. Batch 1 - (Mean Weight) 56 grams Standard Deviation - 6 gr...

**E**

Which is the best way to learn new material? A. Use techniques that appeal only to your preferred learning style. B. Review notes every day. C. Consistently study the same way. D. Use techniques that appeal to all three learning styles

**chemistry**

how many moles of O2 are contained in 6.53 L with 297 K and 6.6 atm

**Maths**

Ray and Roxanne leave from the same spot for their morning run. Roxanne runs due North at 8 km/h while Ray runs due East at 11 km/h. Find the distance and bearing of Roxanne from Ray after 20 minutes. Round your answers to one decimal place.

**Pre-Calculus**

How would I write this in exponential form? log(3)1/27= -3

**Pre-Calculus**

*** final answer 3+5/4(3x-5) 3+5/12x-20

**Pre-Calculus**

Simplifying Complex Fractions [(x+3)/12] / [(4x-5)/15] [(x+3)/12] x [15/(4x-5)] (x+3)5/4(3x-5) (5x+15/12x-20)<-- final answer Did I do this right. If not could you please explain how to do it correctly

**science**

I think it is gravity but its probably wrong because I suck at science and I get like B's and hardly A's

**PHY 101**

An archer aims an arrow precisely horizontally over a large, flat field and lets it fly. At the same instant, the archer's watchband breaks and the watch falls to the ground. Does the watch hit the ground before, at the same times as, or after the arrow hits the ground? De...

**Pre-Calculus**

Could you please explain how to use a matrix (matrices) to solve a system of linear equations (two variables)? My book doesn't explain it in a way I can understand. Please and thank you.

**Pre-Calculus**

Thank you.

**Pre-Calculus**

Thank you so much.

**Pre-Calculus**

Solve by using the substitution method 1.x=-3y+4 and 3x+9y=12 3(-3y+4)+9y=12 -9y+12+9y12 0=0 x=-3(0)+4 x=4 Would there be infinite solutions or would it be (0,4)? 2. x=3y-1 and 2x-6y=-2 2x-6y=-2 2(3y-1)-6y=-2 6y-2-6y=-2 0=0 x=3y-1 x=3(0)-1 x=-1 Would there be infinite solution...

**Pre-Calculus**

I have to use the substitution method to solve the system of equations. 4x-y=9 and 2x+3y=12 I worked this problem myself and could not find a possible solution. So I put that it is inconsistent. Is that correct? If not could you please help me?

**Pre-Calculus**

If you solve the following system of equations by substitution, which statement is true? x = z x - 2y + z = 6 2x + y - 2z = 1 A. You can substitute z for x into the second and third equations. B. You can substitute x for z into the second and third equations. C. Both methods ...

**Pre-Calculus**

What they did in their example is substitute x with one. I wasn't exactly sure why they were doing that so I came on here in hopes that someone could better explain it. Thank you!

**Pre-Calculus**

State the domain and range of the relation y = 2x + 3 My answer: y= 2x+3 y= 2(1)+3=5 domain: 1 range: 5 This is how my book showed me how to do it. I just wanted to make sure I did it right. If not could you please give me an example?

**Pre-Calculus**

Driving down Bald Mountain in Wyoming, Bob dean finds that he descends 1600 feet in elevation by the time he is 2.5 miles (horizontally) away from the high point on the mountain road. Find the slope of his descent (Hint: 1 mile = 5280 feet) After converting the miles to feet I...

**Spanish 2**

Ms.Sue thanks for sending it to the expert. And SraJMcGin thanks so much for taking a look at it and helping me. I'm going to speak with her. Thanks so much and sorry about the separated answers.

**Spanish 2**

I turned these in and my teacher said all my answers were wrong. I'm so confused because when I go through my chapter it says differently.Can someone please help?! A. Supply the correct form of the adjective. 1. rojo Hay una pluma _____ encima de la mesa. 2. alto La chica ...

**jmhs help**

B. An individual can learn using only his or her preferred learning style.

**Physics**

A force compresses a bone by 0.10mm. A second bone has the same length but twice the cross-sectional area as the first. By how much would the same force compress the bone?

**Science Help!**

A light beam has a frequency of 5 x 1015 Hz. What is its wavelength?

**Science**

1. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation? 2. For the radar above, how many seconds will it take for a signal to reach an airplane 15 km away, and return to the radar installation

**Calculus**

A differentiable function f(x,y) has the property that f(2,2)=2 and fx(2,2)=1 and fy(2,2)=2. Find the equation of the tangent plane at the point on the surface z=f(x,y) where x=2, y=2.

**science/math/physics**

A shopper pushes a cart 41 m south down one aisle and then turns 90.0° west and moves 28 m. He then makes another 90.0° turn and moves 14 m. (a) What is the largest possible displacement of the shopper? ____m ___° counterclockwise from west

**7th grade science Ms. Sue please help if you can**

I'm pretty sure 5 is right. I think the answer would be "altitudes". Which isn't a choice.

**Algebra 2**

Absolute Value Equations Will someone please check to see if I am doing this correct? 1.|7x+2|=10 x= (8/7) or (-12/7) 2.|3x-5|=-1 I got "no solution" because "d" cannot be negative. 3.|x^2-2x-16|=8 x= 6,-4 or x=4,-2 4.|3x-2|=7 x= 3 or (-5/3) 5.|x^2+2x+1|=-4...

**Algebra 2**

5/(2y+6)+1/(y-2)=3/(y+3)?

**Algebra 2**

√(x-10)+4=0

**Algebra**

(2x+3)^(1/2)=4 (5x-5)^(2/3)=16

**Algebra 2**

[(8x^5)+(10x^4)]-[(4x^3)-(5x)]=0

**Algebra 2**

3n^4-4n^2=-1

**Algebra 2**

x-3x^1/2+2=0

**Algebra 2**

6X^(2/3)-5X^(1/3)-6=0

**Algebra 2**

6X^(2/3)-5X^(1/3)-6=0

**Algebra 2**

x-3x^(1/2)+2=0

**Finance**

During a job interview, Pam Thomson is offered a salary of $28,000. The Company gives annual raises of 6 percent. What would be Pam's salary during her fifth year on the job?

**math**

ok i have 10th grade math next year and i dont even know half the stuff for this year and its summer brake and im worrying about math..what do i do

**angebra**

ok i have 19th grade algebra next yeah and i dont even know half the stuff from thid year...soo what di i do cuz i am totsly going to fail i mrn itd summy snd im worried about algebra

**Chemistry **

the mass of the crucible is 19.73 g fill the crucible with CuSO4 which was 26.44 g Heat the crucible until the water is released it weighed 23.40 g So now, how many moles of water is removed? The number of moles of CuSO4 that after dissolution rest? determine the number of H2O...

**physics**

A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the water to the top of t...

**physics**

If you drop a stone into a well that is d = 122.0 m deep, as illustrated in the figure below, how soon after you drop the stone will you hear it hit the bottom of the well?

**physics**

If you stand on a bathroom scale, the spring inside the scale compresses 0.50 mm, and it tells you your weight is 680 N. Now if you jump on the scale from a height of 1.4 m, what does the scale read at its peak?

**Health Science**

What would be some examples of dilemmas which affect the health promoting work of the podiatrist?

**English**

What is another way to say 'make an informed choice'?

**English**

hmm yeah but this relates only to physical health, what about other concepts of health such as emotional, social, spiritual, mental etc

**English**

hey, I have to write an essay about ''challenges posed by differing concepts of health held by healthcare professionals and the general public'' I don't really know what to talk about. I started by explaining what health is but what challenges might be there?

**Biology**

what does this mean: the rate of blood flow to an organ is related to resistance to flow in the small arteries and arterioles

**Learning**

exactly, it seems very confusing. Well the question states : write a few paragraphs highlighting changes (both positive and negative) that enhance learning -- i missed that day at school but i was told the question is referring to the skills and i just dont know what to write ...

**Learning**

I have to write a few paragraphs on the changes in the skills (both positive and negative) that enhance learning. Now, I wrote a good bit on the positive changes such as improvement in the IT skills, communication, time management etc but what could be the examples of negative...

**math**

what is one fourth of eight

**English language**

what could be an example of something that is urgent but is not important? and something that is important but not urgent? these questions refer to daily actions or well any actions, i have absolutely no idea how to answer that. Sure doesn't urgent and important meant almo...

**english**

A. a desk stocked with supplies. B. a relaxing area such as your bedroom. C. ample amounts of natural light. D. comfortable and balanced temperature

**Math**

Prove these identites I really need help with these I dont understand how to do them !!!! sin^2+tan^2=sec^2-cos^2 sin^2 sec^2 +sin^2=tan^2+sin^2

**Calculus**

I meant the same final answer, because now I get 28/3 and 100/3

**Calculus**

I get the same answer...

**Calculus**

I know I posted this problem earlier but I dont think it will be seen anymore since it's almost at the end of the page: Find the total mass of the triangular region with coordinates (-1,0),(0,4),and (1,0). All lengths are in centimeters, and the density of the region is (x...

**Calculus**

What I did was: INT (-1,0) (4x+4)(5+x) dx INT 4x^+36x+20 I integrated and got (4/3)x^3+18x^2+20x and evaluated from -1 to 0 and got 10/3 g and then from 0 to 1 and got 118/3 grams added and got 128/3 g and that's not the answer. What am I doing wrong?

**Calculus**

Find the total mass of the triangular region with coordinates (-1,0),(0,4),and (1,0). All lengths are in centimeters, and the density of the region is (x)=5+x grams/c^m2. I know that to get the total mass i have to do density* lenght and ingegrate, but I dont know how to to it...

**calculus**

The given curve is rotated about the y-axis. Find the area of the resulting surface. y = 1/4x^2 − 1/2ln x, 4 ≤ x ≤ 5 The answer is supposed to be 64/3*pi

**Calculus**

A steady wind blows a kite due west. The kite's height above ground from horizontal position x = 0 to x = 60 ft is given by y = 150 − 1/40(x − 50)^2. Find the distance traveled by the kite. (Round your answer to one decimal place.) THe answer is supposed to be ...

**Physics**

Supercapacitors, with capacitance of 1.00F or more, are made with plates that have a spongelike structure with a very large surface area. Determine the surface area of a supercapacitor that has capacitance of 1.0F and an effective separation between the plates of d=1.0 mm So t...

**probability**

i don't know

**life orientation**

2 institutions that redress teenage pregnancy