Number of results: 10,904

**science help**

How can you describe the location of hafnium (Hf, atomic number 72) on the periodic table? choose all that apply. -Transition metals -noble gases -group 6, period 4 -group 4, period 6 pls help me damon or ms sue pls help me pls pls pls

*March 31, 2015 by Oscar*

**math help pls pls pls**

Given f(x) = 4x + 13 and g(x) = 10x − 2, solve for (f + g)(x) and select the correct answer below. (f + g)(x) = 14x + 15 (f + g)(x) = 14x + 11 (f + g)(x) = 6x + 11 (f + g)(x) = 6x + 15 is it b pls help me

*March 31, 2016 by Oscar*

**physics**

A man is driving his car ata velocity of 100km/h on a straight road. H e sees a traffic jam at a distance and slows down to 12.5m/s in 3.0s. What is the average acceleration of the car? pls help. I know that the formula for average acceleration is V2-V1 divided by T2-T1 but ...

*October 12, 2011 by ted*

**math help pls pls pls**

The graph below plots the values of y for different values of x: Plot the ordered pairs 1, 3 and 2, 4 and 3, 9 and 4, 7 and 5, 2 and 6,18 Which correlation coefficient best matches the data plotted on the graph? 0.5 0.8 0.9 1.0 pls help me

*March 19, 2016 by Oscar*

**science**

pls. pls. pls. somebody help me...you see im on a science class and i don't want to go to the regular section, so pls.... give me an acrostic for the word "SCIENCE"

*June 11, 2008 by chris*

**geography**

hi,i have make a project on hurricane Katrina on disaster management pls help to get information pls pls help me............

*June 17, 2010 by varsha*

**Chemistry :'(**

(d) Which of the following sets of quantum numbers is not permitted? Select all that apply. 2,1,1,-1/2 1,1,0,-1/2 2,-1,1,-1/2 3,2,1,1/2 Pls pls pls help me :( x

*November 18, 2012 by Anonymous*

**Math pls help me pls pls**

If the outliers are not included, what is the mean of the data set? 72, 82, 3, 55, 62, 73, 90, 80, 151, 59, 46, 31 59 65 67 73 is it b

*February 10, 2016 by Jason*

**help pls world history pls pls**

Which of the following is not associated with one of the pillars of Islam? charity faithfulness sacrifice self-glorification

*February 28, 2016 by Oscar*

**world history pls pls help help**

Who was the power behind the throne during Justinian's reign? Belisarius Augustus Sophia Theodora is it d pls help

*February 29, 2016 by Oscar*

**science help pls pls**

Which of the following terms refers to the foamy bubbles of a breaking wave? Duration Fetch Speed Surf is it d pls help me

*April 15, 2016 by Oscar*

**Algebra1**

what are the coordinates of the vertex of the parabola defined by: f(x)=9(x-8)+8 I'm confused on how to solve this. Help pls

*July 20, 2015 by kesha*

**math help pls pls pls**

Choose the polynomial written in standard form. x^3y^2 + 4x^4y + 10x^9 x^4y^2 + 4x^4y^5 + 10x^2 xy^2 + 4x^3y^8 + 10x^2 x^4y^5 + 4x^3y^2 + 10x^2 is it the last one pls help

*March 31, 2016 by Oscar*

**Trig**

Need answer check pls. Find the rectAngular equation for the plane curve by parametric equAtions. X=t +4 , y= t^2

*April 25, 2010 by Stacey grahaM*

**chem**

What does it mean by Keq? Pls need an explanation with this. I'm a little bit confused. Thanks

*December 3, 2012 by Bea Alonzo*

**science help pls pls**

The information about groundwater recorded by a student is valid when it is not biased its results cannot be repeated it is not obtained from a primary source its findings do not have to be shared with others is it a pls help me

*April 11, 2016 by Oscar*

**algebra pls pls help**

Factor completely: 2x^3 + 14x^2 + 6x + 42? A. 2[(x^2 + 3)(x + 7)] B. (2x^2 + 6)(x + 7) C. (x^2 + 3)(2x + 14) D. 2(x^3 + 7x^2 + 3x + 21) is it d pls help me

*May 12, 2016 by Oscar*

**world history pls pls help help**

What did special religious observances in both the Aztec and Spanish calendars provide for people? Work and income Education and training Law and justice Fun and entertainment is it d pls help

*March 14, 2016 by Oscar*

**science help pls pls**

Which of the following is typically associated with a large amount of organic material in a water supply? Lower turbidity Higher phosphates Fecal coliform High dissolved oxygen is it c pls help

*April 3, 2016 by Oscar*

**Finance**

Omega Instruments has budgeted $300,000 per year to pay for certain ce- ramic parts over the next 5 years. If the company expects the cost of the parts to increase uniformly according to an arith- metic gradient of $1 0,000 per year, what is it expecting the cost to be in year...

*May 26, 2013 by Aly*

**Math**

using echelon method 4x-2y=9 20x-10y=27 pls help with problem. Once I get 24x -2y 36 I'm confused after that.

*February 27, 2010 by Marie*

**Math**

Can u pls pls pls solve this algebraic expression?? I cant solve it although I tried many possible ways and solutions :/ 10+1/3[4k-(18+7k)]

*July 31, 2011 by Sally*

**trig confused.. pls help**

A group of mountain climbers are using trigonometry to find the height of a mountain located in the Rockies. From point A, which is due west of the mountain, the angle of elevation to the top is 56 degrees. From point B, which is due east of the mountain, the angle of ...

*May 3, 2011 by Mhy*

**science help pls pls**

Which of these surface features are formed when the acid in groundwater reacts with limestone? rivers and springs sinkholes and caves hot springs and geysers wetlands and volcanoes is it b pls help me

*April 12, 2016 by Oscar*

**math help pls pls pls**

Create an example of a polynomial in standard form. How do you know it is in standard form? pls help me

*March 20, 2016 by Oscar*

**Chemistry**

Determine the mass of zinc sulphide,ZnS which is produced when 6.2 g of zinc and 4.5 g of sulphur are reacted. This question is really confusing me, and I'm not sure where to start. I think I have to calculate the moles of each given reactant first in which case I have: nZn = ...

*October 17, 2010 by Dan*

**Calculus**

1. integral (x^3 * sqrt(x^2-4)) dx I'm confused on how to start this problem, if I am doing trig substitution.

*April 5, 2015 by K*

**Trig**

Just confused. Given tan(A) = 2 and A is in Quadrant I, find sin(2A). A. 0 B. 1 C. 1/2 D. 4/5

*October 7, 2016 by Iris*

**(pls help) Trig**

point P and Q are respectively 24m north and 7m east of point R. What is bearing of Q and P to the nearest whole degree.(a)52(b)164(c)134(d)159

*July 7, 2013 by david*

**math help pls pls pls**

Choose the correct simplification of the expression the quantity a to the 2nd power over b to the 3rd power all raised to the 4th power. A. a to the 6th power over b to the 7th power B. b^12 C. a^8b^15 D. the quantity a to the 8th power over b to the 12th power pls help me

*March 21, 2016 by Oscar*

**trig**

The displacement (in centimeters) of a particle moving back and forth along a straight line is given by the equation of motion s= 2 sin pi t + 3 cos pi t, where t is measured in seconds. (a) Find the average velocity during each time period: (i)[1,2] (ii) [1,1.1] (iii) [1, 1....

*September 23, 2008 by Sarah*

**afrikaans (AFK503/101)**

Hi there, can anyone pls help me with AFK1503/101 - 2015. I am seeking an English version of this assignment pls, is there an English one available? if there is pls provide me with a website address to get access. Thank you. Tanya

*August 12, 2015 by Tanya*

**Physics**

A child pulls a wagon along level ground. The handle with which she pulls the wagon makes an angle of 20.0 degrees with the ground as the child pulls with a force of 78.0 Newton. What are the components of the force. Pls pls pls pls help me answer this and may God bless u!

*October 16, 2013 by Stephanie*

**math help pls pls pls**

Consider the functions f(x) = 2x + 1 and g(x) = x^2 − 10. What is the value of f[g(3)]? 39 −3 −7 −1 pls help me

*March 31, 2016 by Oscar*

**math**

y=x^2e^x I am suppose to find the dy/dx of this the way i did it was x^2e^x times dy/dx of x^2 and got x^2e^x times 3x^2 this is not right and im confused on how to solve it help pls.

*August 12, 2009 by sonia*

**math help pls pls pls**

Four polynomials are shown below: A. 2 − 2x5 + 2x2 B. 5x3 + 5 − 5x4 C. 3x + 2x5 D. 6x3 − 1 Which of the above polynomials is a 5th degree binomial? Polynomial A Polynomial B Polynomial C Polynomial D pls help me

*March 21, 2016 by Oscar*

**Trig**

Verify and identify, I am so confused on how to do this? this is an extra credit but I am lost, please help. cot(Ý-ƒÎ/2)=-tan Ý

*October 22, 2014 by Maxine*

**Computer science**

How can i use the 'Adobe Photoshop'? I am really confused how to use/edit a photo. Will ypu pls help me to know about it? Thank you

*December 10, 2014 by Jahanara*

**algebra pls pls help**

Determine which polynomial is a perfect square trinomial. 49x2 − 28x + 16 9a2 − 30a + 25 25b2 − 45b − 81 16x2 − 24x − 9 is it b pls help me

*May 12, 2016 by Oscar*

**Chemistry**

PLS HELP ME(1)Write a balanced equation in each case dilute hydrochloric reacts with[i]ZnCO3[ii]CuCO3 (2)Discuss how hydrocarbons contribute to the formation of ozone in the atmosphere.I'M CONFUSED I NEED HELP!

*June 18, 2015 by Anonymous*

**Algebra 2/Trig**

Solving Multivariable Linear Systems: 3x-5y+5z = 1 5x-2y+3z = 0 7x-y+z = 5 I am confused on how to solve this. I'm supposed to use the Row-Echelon form. Thanks.

*February 26, 2009 by Chris*

**chem**

Describe in detail by words how to prepare 200ml of .150M HCl from a 1.00 M HCl stock solution? Need help with this please? i used C1V1=C2V2 and got volume 2 = 33L or 0.33mL. to prepare the solution i need to weigh 1 gram of HCL (from 1.00M HCl stock solution)lets say i put it...

*November 27, 2012 by vince11*

**science help pls pls**

A scientific law can be best described as an explanation of a specific relationship a series of observations with contradictory data a phenomenon which works under changing conditions a description of specific relationships under given conditions is it a pls help me

*April 15, 2016 by Oscar*

**science help pls pls**

Which of these statements best explains why scientists use models? to allow other scientists evaluate their data to speed up or slow down natural processes to describe and explain non-observable objects and processes to predict the scientific theories which would be proposed ...

*April 12, 2016 by Oscar*

**Physics help**

A 90 kg parachutist in free fall has an acceleration of 6.8 m/s^2. What is the frictional force provided by air resistance when she is accelerating at this rate? For this question i got 612N but the text book answer says it is 270N. Pls help!! I'm confused

*March 21, 2013 by Ted*

**science help pls pls**

One group of scientists has proposed a new theory on Adaptation. A majority of scientists worldwide agree with the theory. The theory is most likely biased. incomplete. accurate. unchangeable. is it accurate pls help me

*April 28, 2016 by Oscar*

**chem**

4HCl+O2=2Cl2+H2O Detremine the Kc expression for the reaction above by identifying what belongs in the numerator and what belongs int he denominator? pls do help trying to understand the concept but still confused.

*November 19, 2012 by byke*

**vectors**

Show that a¡Á(b c) = (a¡Áb) (a¡Ác), given that a =(A B), b =(B C), c =(C A). WORKINGS ... given, a¡Á(b c) = (a¡Áb) (a¡Ác) :. imputing the values of a, b and c (A B)¡Á[(B C) (C A)] = [(A B)¡Á(B C)] [(A B)¡Á(C A)] solving for a¡Á(b c) a¡Á(b c) = (A B)¡Á[(...

*January 26, 2015 by Francis*

**MANIPULATION OF DNA**

can anyone describe to me what this is pls? also can anyone pls explain how dna manipulation works and what it does pls?

*April 1, 2009 by GLORIA*

**physics.pls help**

How do you know what element is chemically active on the periodic table? PLS HELP

*October 5, 2011 by ted*

**math help**

1/4 divided by 3/8 pls help me im confuss i forgot the ste pls explain

*October 27, 2012 by Anonymous*

**pre algebra**

2x^2 + 8 - 4x + 3x - 6x^2 + 7 what does this simplify to A)-8x^2 - 7x + 15 B)-4x^2 - x + 15 C)4x^2 + x + 15 D)8x^2 + 7x + 15 pls help me reiny steve or damon pls help me

*March 23, 2015 by Oscar*

**math pls help me**

(-2y + 5 )(y + 3) what would this simplify to? A)-2y^2 + 8y + 15 B)-2y^2 - y + 15 C)2y^2 + 8y + 8 D)2y^2 - y + 8 pls help me steve or damon or ms sue

*March 23, 2015 by Oscar*

**math**

Pls i want you to teach me the 5 90 lotto formular pls i need it now

*September 30, 2015 by abiodun*

**food science**

pls give me an idea on the formulation of bavarian cream filling. pls. thank you

*January 4, 2008 by vcq*

**Science(Help NOW, Pls)**

wat elements make up water? pls help! i will be very happy if you do! :S

*December 15, 2010 by GirlSense*

**physics.pls help**

Why is it important to asaume that a rope under tension is taut and does not stretch. pls help

*November 14, 2011 by ted*

**science help pls pls**

Which of these is the most practical method to prevent global water shortage? Stop planting trees and shrubs in gardens. Conserve, recycle and reuse water in households. Stop using appliances like washing machines and dishwashers. Discourage setting up of power plants which ...

*April 11, 2016 by Oscar*

**science help pls pls**

Dams are used to produce hydroelectric power. Which of these best describes the impact of a dam on the environment? It causes air pollution. It reduces the level of groundwater. It causes changes in the river ecosystem. It reduces the level of oxygen in river water. is it c ...

*April 12, 2016 by Oscar*

**math help pls pls pls**

A company is deciding whether or not to hire a new worker. The company must pay the worker hourly and cover a daily cost for insurance. The cost to pay an hourly worker for one day is represented by the function y = 8x + 25, where x is hours. What is the y-intercept, and what ...

*March 18, 2016 by Oscar*

**Science(Help NOW, Pls)**

organisms in which domain live in every environment? pls help, im stuck on this one. :S

*December 15, 2010 by GirlSense*

**physics.pls help**

A 100g bird sits in its nest. what is the Fnet(net force) in this case? pls help

*November 10, 2011 by ted*

**physics.pls help**

can you help me to isolate the ''t'' in this formula. d=V1t+1/2at^2 pls help

*November 5, 2011 by ted*

**(pls help) algebra**

4x+y-32=1, 6x-y-4z=7, 10x+2y-6z=5 pls show me how to solve for x,y,z. Ans:xx=1.5,y=-2,z=1

*July 8, 2013 by david*

**english,zulu,math lit,geography,life sciences,life orientation and history**

2016 is my last year at school but am still confused about my career couse i don't know what i want to be in life so pls help

*February 4, 2016 by pretty presant*

**Math**

This one confused me since it revolved around what seemed like dividing trig function by another function Write the following expression in terms of the tangent function 2 / ((cos(r^2 - s^2) / (sin(r^2 - s^2)) = ? I know tan t = sin t / cos t. So would I multiply by the ...

*November 14, 2014 by Taylor*

**e commerce or marketing, help pls**

hi,good evening everyone can you help me on finding a clothing manufacturer resource system??? pls thank you

*December 6, 2011 by need ASAP*

**Algebra help pls fast**

How do you Find the lateral area of a square pyramid. base:8 Height:22. and side:8 Help pls

*January 8, 2016 by Laura*

**Math Precal/Trig**

Solve for n. 7((1-(-3)^n)/(1-(-3))=3829 I was confused on distributing the number 7, because we've always had problems with the number 1 on the outside.

*September 18, 2014 by Samee*

**Chemistry**

rank the following atoms and ions in the order of expected increasing radius: Ca, Ca2+, Ar Pls pls help me kindly... Anyone?

*November 18, 2012 by Anonymous*

**PLS HELP ME WITH ONE MATH QUESTION!!???**

pllllsssss help me!!!!!!! 5. How many lateral edges are there in a triangular prism? (1 point) 6 3 9 12 I don't know if its 6 or 9 or even 12!!??? pls help asap!!!!!

*February 19, 2014 by TTR+S<3*

**Pre-Algebra Help pls fast**

How do you Find the lateral area of a square pyramid. base:8 Height:22. and side:8 Help pls

*January 8, 2016 by Laura*

**algebra pls pls help**

The equation f(x) = 4x^2 − 16x + 9 represents a parabola. What is the vertex of the parabola? (2, −7) (−2, 57) (4, 9) (−4, −137) is it a pls helpme

*May 12, 2016 by Oscar*

**Trig**

Find all the solutions in the interval [0,2pi). 2sin2x - sqrt(2) = 0 sin2x = sqrt(2)/2 I'm confused by the double angle. Please help.

*December 2, 2008 by Travis*

**trig**

I'm trying to see if the teacher didn't give us the right problem or if I'm just not getting it. The problem is "re-write the expression without a fraction: 4/(1-sin x)". I can do it if the problem is sin squared x but I don't know how to solve the problem given. Pls help. thx

*September 19, 2009 by Priscilla*

**Help pls.**

Compute the acceleration of the block sliding down a 30 deg inclined plane if the coefficient of kinetic friction is 0.20. Show solution pls.

*August 23, 2014 by Yan-yan*

**LA --- 1 question pls help!!!**

hi, one question based on the short story called, "Cyber Chitchat" this one confuses me, pls help if u know the book! 8. The tone of "Cyber Chitchat" is (1 point) serious. humorous. depressing. angry. i think its humorous but im not so sure..... pls help asap!!!!! thanx in ...

*March 2, 2014 by TTR+S<3*

**science help pls pls pls**

A new object, Object Y, was discovered outside our solar system. Object Y is small and rocky, is not a satellite of any other object, and it does not have enough gravity to clear away smaller objects near its orbit. The characteristics of Object Y most closely resemble those ...

*April 15, 2016 by Oscar*

**science help pls pls**

Jupiter is 5.2 AU from the sun. What is its distance from the sun in kilometers? 28,846 km 78,000 km 28,846,153 km 780,000,000 km is it d pls help

*April 21, 2016 by Oscar*

**math help pls pls pls**

Find the quotient of the quantity negative 36 times x to the 3rd power minus 6 times x to the 2nd power plus 12 times x all over negative 6 times x. −36x3 − 6x2 − 2 −6x2 + x − 2 6x2 − x + 2 6x2 + x − 2 pls help me

*March 21, 2016 by Oscar*

**trig**

can you please show me in steps how to find f(1+a) in this equation f(x)=-2x^2+4x+6 i know that you will plug in 1+a anywhere there is x. but after that i get confused. also can you tell me how to find the domain and range of a relation for ex. 2x+5y=10 thanks for your help!

*November 14, 2008 by y912f*

**physics**

pls explain this to me ? "momentum is inertia....but inertia is NOT momentum" :S confused

*December 9, 2012 by Anya*

**CHEMISTRY> HELP QUICK! pls**

I GOT THIS WRONG IN AN ASSIGNMENT. I HAVE AN EXAM IN 2 DAYS. CAN YOU SHOW ME HOW TO DO IT PLS. What is the pH of a 2.62 x 10 -1 M NaNO2 solution ? NB the pKa for HNO2 = 3.153. 12.13 13.42 1.87 8.29 0.58

*June 4, 2010 by Lucinda*

**math --- 2 questions!**

help pls!!! i am confused!! can you check to see if these are right!?? 4. List all of the quadrilaterals with exactly one pair of parallel sides. (1 point) parallelogram; trapezoid rhombus; parallelogram; rectangle trapezoid rhombus; square; rectangle 5. List all of the ...

*January 30, 2014 by TTR+S<3*

**science help pls pls**

Which of the following is typically associated with a reduction in photosynthesizing plants in a water supply? An increase in dissolved oxygen A decrease in dissolved oxygen An increase in phosphates A decrease in phosphates pls help me

*March 27, 2016 by Oscar*

**ss --- one question pls help!**

pls help!!! What kept the price of cotton high in the years before 1860? a. cotton gin b. demand in Great Britain c. slavery d. large plantations I origionally thaught it was a. cotton gin, but after research, it looks like it was b. demand in GB my textbook doesnt say ...

*February 27, 2014 by TTR+S<3*

**geometry**

Write a paragraph proof. Given: A is congruent to B. B is congruent to C. and D is perpendicular to C. Prove: A is perpendicular to D im reallllyyy confused pls help me write this out

*December 1, 2015 by HELENA*

**math help pls pls pls**

The map of a biking trail is drawn on a coordinate grid. The trail starts at P(−7, 6) and goes to Q(4, 6). It goes from Q to R(4, −6) and then to S(6, −6). What is the total length (in units) of the biking trail? 25 12 13 21

*March 16, 2016 by Oscar*

**physics- TEST TMRW PLS HELP!**

how would i do this? -----------------A-----------B-------- I<----1.5m------>l<--0.6m-->l<-0.3m->l a carpenter carries a 6kg board . the downward force he feels on his shoulder (A) is .... ? (B is where his hand is) pls help!! i have so much difficulty with ...

*December 9, 2012 by Anya*

**History**

The Transcendentalism movement most directly affected the development of American politics literature popular culture painting and sculpture Is it c. Pls help me ms sue or dr.bob or steve or anyone pls help me

*March 20, 2015 by Oscar*

**world history pls pls help help**

What caused the downfall of Ghana? a) Climate change and Berber battles b) Songhai invasions and disease c) Internal revolts d) Depletion of the salt mines is it b or c

*March 14, 2016 by Oscar*

**physics**

pls explain to me how you add 65km{North 85 degreesWest], 3500m[South 10 West}, 6000m{East 70 degrees South], 54km[North 60 degrees East]. pls explain to me how i should add these vectors. I really need help. pls help

*October 26, 2011 by ted*

**math pls help!!!!!**

these are the few i don't know/im not sure. pls help! The distance from Newtown to Oldtown on the highway is (6x^2 + 2x – 2) miles. Using the back roads, the distance is (5x^2 – 8x – 6) miles. How many miles shorter is the second route? A. 11x^2 + 10x - 8 B. -x^2 - 6x + ...

*May 31, 2014 by zumai*

**algebra-trig**

Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.

*April 12, 2012 by missy*

**algebra-trig**

Can someone please explain to me how to graph sine and cosine step by step because I am so confused and I really really need help.

*April 12, 2012 by missy*

**math help pls pls pls**

Find the quotient of the quantity negative 15 times x to the 2nd power times y to the 6th power plus 50 times x to the 4th power times y to the 3rd power minus 20 times x to the 2nd power times y all −3y5 + 10x2y2 − 4 −15x2y6 + 50x4y3 − 4 3y5 + 10x2y2...

*March 21, 2016 by Oscar*

**Trig**

Find the amplitude, if it exists, and the period of: y=tan1/4x. no amplitude I got confused, is the period 4pi? And is that the same as saying 360 degrees?

*March 7, 2008 by does it matter at this point?*

**Math**

Pls help .[1] Solve the eguation 4*=28. [2] change 1/20 to decimal [3] change 60% to a common fraction . Pls i need the solving thank you

*February 23, 2012 by Bright*

**calculus**

After solving with A=(-1,2) x^2+2x^2+x+1 got 119/12a pls where did i get it wrong. And with -[(-55)] x^2-25dx i got -50 pls am i correct

*September 7, 2013 by grace*

**Lotto game**

This is winning Number, 55-80-83-65-3, pls can you help me out of the next number on 1th feb 2014, pls,

*January 30, 2014 by Adekunle*