# Posts by lydia

Total # Posts: 206

math
Can you please help me simplify this into one fraction? 3/(x-3) - 5/(x/2) Here are the options: A) -2x+9/(x-3)(x-2) B) -2x/(x-3)(x-2) C) -2x-9/(x-3)(x-2) D) 2x+9/(x-3)(x-2) I think it's option D but I'm not so sure :(

Chemistry
Please help me these are the only two I have left. 17. If the solubility of a gas is 5.6 g/L at 505 kPa pressure, what is the solubility of the gas when the pressure is 1010kPa? * 19. Calculate the [H?] for the aqueous solution in which [OH?] is 1 x10??. Is this solution ...

Chemistry
Can someone check my answer and let me know me if the are right or wrong. 1. What is the maximum amount of KCl that can dissolve in 600 g of water? (The solubility of KCl is 34 g/100 g H?O at 20°C.) * 34 g 204 g ***** 2040 g 3. (1 point) If the solubility of a gas in water...

Chemistry
Can someone check my answer and let me know me if the are right or wrong. If I wrong can you give me the right answer plz. 1. What is the maximum amount of KCl that can dissolve in 600 g of water? (The solubility of KCl is 34 g/100 g H?O at 20°C.) * 34 g 204 g 56 g******* ...

Algebra
Determine the discriminant for the quadratic equation -3 = x^2 + 4x + 1. Based on the discriminant value, how many real number solution does the equation have? Discriminant =b^2 - 4ac

Science
When calculating delta Tsample,why is th initial temperature taken to be 100 degrees Celsius

Math
The temperature at 6:00 pm was 33°f.over the course of the day, the temperature decreased 5.5°F per hour. What was the temperature at midnight?

english
Nwoye and Ikemefuna as a representation of the rise of new cultural formation among the igbo society in Achebe's Things Fall Apart

english
Chinua Achebe's Things Fall Apart as a Postcolonial novel

english
Chinua Achebe's Things Fall Apart as a defiance of eurocentric sociological and anthropological narration of South Africa

math
Earned five dollar earned \$5.50 per hour as an assistant in an auto repair shop how much will Taylor on if she works for and a half hours on Friary's

Math
if 6 workers complete a 1 km of roadway in 4 days. how long would it take for 4 workers to complete 3 km of roadway

Trigonometry
Suppose *u* is a quadrant IV angle with cos(u) = 3/5. Suppose *v* is a quadrant IV angle with cos(v) = 12/13. Find the exact value of sin(u-v) I have gotten to sin120cos150 - sin150cos120 but I am not sure I am correct up to that point and I don't know where to go from there.

Math
A tennis racket is offered at 25% off. Including 7% sales tax, the final price is \$67.41. What is the original price, without tax or discount?

Science (Physics)
Air becomes a conductor when the electric field strength exceeds 3.00 × 106 N/C. Determine the maximum amount of charge that can be carried by a metal sphere 8.5 m in radius. The value of the Coulomb constant is8.99×109 N·m2/C2. Answer in units of C. I have ...

physics
Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 17.0 m, B = 10.0 m, C = 11.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs ...

physics
Can anyone help just can figure it out. Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 17.0 m, B = 10.0 m, C = 11.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) ...

physics
Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 17.0 m, B = 10.0 m, C = 11.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs ...

physics
a mass if 10kg move with a velocity of 4ms-1find it kinetic energy.

geometrie
(4, 5)'(9, 5) and (5,1) are three of a quadrilateral whose opposite sides are equal and parallel.there are three possibilities for the co-ordinates of the missing vertex.Find all three,and draw the three quadrilateral on a grid

Math
IN A CLASS OF 55 STUDENTS, 35 TAKE ENGLISH,40 TAKE FRENCH AND 5 TAKE OTHER LANGUAGES. DETERMINE HOW MANY STUDENTS TAKE BOTH LANGUAGES

Urgent math
please help The fox population in a certain region has a relative growth rate of 7% per year. It is estimated that the population in 2005 was 19,000. (a) Find a function n(t) = n0ert that models the population t years after 2005. n(t) = (b) Use the function from part (a) to ...

Urgent math
population growth model. Can anybody please help me out in trying to solve this problem? It's my homework and I don't seem to understand what I am getting. The count in a culture of bacteria was 400 after 2 hours and 25,600 after 6 hours. (a) What is the relative rate...

College Algebra
f(x) = x2 + 11x, x ≥ − 11/2 find the inverse

College Algebra
A function f has the following verbal description: "Multiply by 5, add 9, and then take the fifth power of the result." and find the inverse?

Algebra
Find the net change in the value of the function between the given inputs. g(t) = 8 − t2; from −6 to 9

Algebra
If g(x) = x2 + 8x with x ≥ −4, find g−1(20)

College Alg
Find the inverse function of f. f(x) = 36 − x2 , 0 ≤ x ≤ 6 I can't seem to find this inverse, someone help please?

College Algebra
If g(x) = x2 + 6x with x ≥ −3, find g−1(55) I need help solving this problem this is an example but it does not thoroughly is explained. :/

College Algebra
nevermind I got it

College Algebra
A rectangular parcel of land is 20 ft longer than it is wide. Each diagonal between opposite corners is 100 ft. What are the dimensions of the parcel? This is an Example in the book but it does not clarify in the text book, Can anybody please show me how to do this?

L.A the book
C and A... just took the test

educational technology
3. adding transitions to slides in a presentation A. offers effects when moving from one slide to the next.***** B. adds animation to selected text and images. C. adds a new slide to a presentation in microsoft powerpoint. D. creates sound effects connected to an image. 4. ...

HISTORY
Choose two famous Americans who lived during the period 1820–1860. • Research the two people you chose. • Analyze your research. • Write a dialogue between the two famous Americans Can somebody help me with this? * Give me ideas for people * Research on the...

acounting
A company purchased and installed a machine on January 1 at a total cost of \$72,000. Straight-line depreciation was calculated based on the assumption of a five-year life and no salvage value. The machine was disposed of on July 1 of the fourth year. The company uses the ...

Setswana
O tshwanetse go tlhompha setso sa gago

science
An experienced mountaineer decided to climb mount everest using the same route in the same season and with similar materials and equipment used by a fatal 1924 expedition . The scientific purpose of such a climb would be to

science
Pepsin,which speeds up the breakdown of protein,is classified as

L.A.
just thought I'd let you know 3 is wrong the correct answer I 1 because I just took the quiz and got that one wrong

accounting
im stuck too

calc / physics
Suppose that a 5-foot-long chandelier falls from a 35-foot ceiling and that you are 6 feet tall and standing directly under the chandelier (a) How long do you have to get out of the way when it drops? =-16(t^2)+Vt+h =-16(t^2)+0+(35-5-6) (for the bottom of the chandelier and ...

Algebra
Oh thank that did help :D

Algebra
If twice the opposite of a number increased by five, then the result is the opposite of a number. What is the number? What is this even asking off me?

math equation
Please help me to work this out using the inversion method (I'd appreciate if you could provide a step by step breakdown (I don't understand how to do it and my math really sucks!!): Jim spent 1/3 of his salary on food. He spent 1/4 of it on shoes. He has \$400 ...

Sorry! How about now? 2. B 3. A 4. D

1. Name the coefficients in the polynomial. 4x^2 + 3x - 3 4, -3, -3 4, 3, 4, 3, 3, -4, -3, 2. How many terms are in the following polynomial? 6x^4 + 3x^3 - 2x^2 + 15x - 14 5 4 3 2 3. In the expression -7x - 5x^2 + 5, what is the coefficient of x? 7 5 -5 -7 4. Write the ...

science
i think its b

1. Find the next three terms in the sequence. 30, 22, 14, 6, ... -3, -12, -21 -1, -8, -15** -1, -2, 3, -2, -10, -18 2. Find the next three terms in the sequence. 3, 6, 9, 12, ... 15, 18, 20 15, 19, 20 15, 18, 21 14, 18, 21** 3. Find the next three terms in the sequence. -1, 9...

english
In letter A. into is italicized In letter B. ill is italicized In letter C. at is italicized In letter D. disdainfully is italicized.

english
Which of the following sentences contains an italicized word that's used as a predicate adjective? A. Jerry looks into the microscope. B. Jerry looks ill today. C. Jerry looks at the map. D. Jerry looks disdainfully at the pile of laundry. I think it's B.

history,geograph,life science,life orentation,mathematical literacy,english
Maths lit geography agricultural science life orientation

college physics
(a) use d=vi*t+0.5*a*t^2 manipulate the equation to solve for t 210 m = (23 m/s)t+0.5(0.150 m/s^2)*t^2 t = 9.41 s (b) v = d/t = 210 m/ 9.41 s = 22.3 m/s I'm still trying to figure out the rest...

math
-2(-3x+ 4) >greater or equal to 3(5-2x)

math
how do you do this problem of inequality -2(-3x4 > 3(5-2x)

Math
How can you write a unit rate if at least one term is a fraction? How is this different from writing a unit rate where both terms are whole numbers?

Mahlangu
Identify one environmental or human factor that causes ill health,accidents,crises and disasters within your community or any other community within South Africa.

thermodynamics
a carnot machine operates between a hot reservoir at 200 grade C and a cold reservoir at 20 grade C. When operated as an engine it receives 1000 KJ/kg; find the work output. Find the COP when operates as a refrigerator and a heat pump.

Chemistry
Explain how water of hydration is related to measurement. Then explain how it is related to the law of definite composition

Geometry: Student Correction (Stuck)
BD = 4 DA = 5 DE = 6 Solving for x 1. Joelle’s proportion is correct. 2. Joelle’s proportion is not correct because BD, which is 4, corresponds proportionally to BA, which is 9, not 5. 3. Joelle’s proportion is not correct because DE, which is 6, does not ...

Geometry: Student Correction (Stuck)
Joelle set up the following proportion: 4/6 = 5/x. Solve for x. Determine if proportion is correct. If not, explain what is wrong with it.

Geometry
Triangle ABC has vertices of A(0,0), B(–4,0)and C(–2,4). The coordinates of each vertex in triangle AEF are multiplied by 3 Is triangle ABC~AEF? Explain.

Pre-Algebra
I had this test these answers are correct you'll get 100% hope it helps 1).1,256ft2 2).4,187ft3 3).615cm2 4).1,436cm2 5).8

Chemistry
What is the percent by mass of glucose in a solution containing .15 mol of glucose dissolved in 410 g acetic acid? The molar mass of glucose is 180g/mol.

World Geography
1.a 2.

Write an equation in point slope form of a line parallel to 12x-2y=6 and passes through the point (-4,-3)

Chemistry
A reaction is peformed in which 50 ml of .400M silver nitrate and 75 ml of .100M hydrochloric acid are mixed together. The initial temperature of the solutionn was 25 C and the final temperature was 27.2 C. What is the enthalpy, in kj/mol, for the formation of the precipitate...

chemistry
what is the sum coefficient and balanced equation of : Co(OH)3+Na2CO3 my answer is 3Co(OH)3+ 3Na2CO3---> 3CoCO3+ 3Na2OH

chemistry
How could you use a precipitation reaction to separate the following pair of cations: K^+ and Hg2 ^2+? (write the formula and net formula for each reactant)? The answer is Hg2 ^2+ (aq) + 2Cl- (aq) = HgCl2(s) but how do I work it out?

chemistry
How do I balance the following equation by the half-reaction method (it takes place in basic solution)? Fe(OH)2(s) + O2(g) = Fe(OH)3(s) the answer is 4Fe(OH)2(s) + 2H20(l) + O2(g) = 4Fe(OH)3(s) but how do I work it out?

Math (12th)
Thank you. I tried that and got 3 :)

Math (12th)
What is the common difference in the arithmetic sequence 30, 27, 24, 21, 18, ...

literature
Is Pride and Prejudice identified more with Romanticism or Realism? Even though it was written during the Romantic period, it seems more like Realism to me. Is this correct? Thanks!

slope**

Find the slop of the tangent to the curve y=(10-sqrt x)(5+sqrt x) at x=25

Cross country running
how do you keep motivated to keep going even though your body wants to quit?

Cross country running
Thankyou very much!

Cross country running
Can I do anything for side cramps during a race?

Cross country running
How does one deal with another runners joy after getting sufficiently skunked? In other words, Can I get some tips on how to be a good sport when I get creamed during a race?

science
what is the geometry around each carbon in ethanoic acid

math
if youre looking for x its 6

history
The Philippine-American war was A) a minor event for americans B) more costly than the spanish american war C) fought in a traditional manner D) never completely resolved E) over even before the spanish american war

English
What is an example in "Antony and Cleopatra" of Casear displaying a disposition to not want to go to war? Thank you!

physics
so i found a formula: m1v1ix +m2v2ix = m1v1fx + m2v2fx which i rearranged to find v1fx and eliminated m2v2ix because m2v2ix = 0 so the eqn looked like: v1fx = (m1v1ix - m2v2fx)/m1 subbing in i got: [(0.029)(200) - (1.1)(6.25)]/(0.029) which gave the answer -59.8276. is this ...

physics
i'm just unsure of what formula i should apply!

physics
A 29 g rubber bullet is travelling to the right at 200 m/s, when it hits a 1.1 kg block of wood sitting on a horizontal frictionless surface. If this collision is inelastic (though not perfectly inelastic), and the velocity of the block of wood after the collision is 6.85 m/s ...

physics
Assume you are given two objects whose centre of mass is located exactly at the origin. The first object has a mass of 33 kg and is located at position +30 m with respect to the origin. If the mass of the second object is 7.0 kg, what is its position (in m) with respect to the...

physics
Ian is firmly attached to a snowboard which is on a flat surface of ice, which you can assume to be frictionless. He and the snowboard are initially at rest. He then throws a 138 g ball which travels at a speed of 19.2 m/s, and finds himself moving backwards at a speed of 0.05...

physics

physics
What is the magnitude of the momentum of a car weighing 1,555 N when it is moving at a speed of 23 m/s? Express your answer in kg m/s.

physics
Assuming maximal power output, how long, in seconds, would it take a 1,535 kg car with a 128 hp engine to accelerate from 50 km/h to 102 km/h? (1 hp = 746 W)

social studies
between 1400000 and 500000 years ago early hominids learned how to?

Ecology
Signs of fish stress include A. increased respiration B. faster scale growth C. reduced feeding rates D. both A and C Thanks for the help!

Math
Lee Holmes deposited \$16,600 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional \$41,600 at 9% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s account? I have tried ...

Math
Thannk you both of you but both answers are incorrect. I can input the answer to see if it is right and both are wrong. We are all missing something. If anyone else wants to try please do!!!

Math
Lee Holmes deposited \$16,600 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional \$41,600 at 9% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s account? I have tried ...

history
thanks so much!

history
I couldn't find it on any of those sites.

history
Hi I was wondering if someone could please help me with this question: What was the place of residence of the Ho-Chunk war chief Red Bird? I have searched many places and have had no luck finding the answer. Thanks much! =)

spanish
can someone tell me what this means please Esta campana muda en el campanario, esta mitad partida por la mitad, estos besos de Judas, este calvario, este look de presidiario, esta cura de humildad. Este cambio de acera de tus caderas, estas ganas de nada, menos de ti, este ...

physics
015 (part 1 of 2) 10.0 points A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 21 below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline ...

1. Pages:
2. 1
3. 2
4. 3
5. Next>>

Post a New Question