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trig confused.. pls help

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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

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

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 ...

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

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"

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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...

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.

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)]

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 ...

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

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 = ...

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

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.

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

(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

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

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....

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

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!

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

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

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.

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

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

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

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!

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.

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...

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

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 ...

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

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

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.

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[(...

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?

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

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

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

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

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

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

Science(Help NOW, Pls)
wat elements make up water? pls help! i will be very happy if you do! :S

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

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 ...

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 ...

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

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 ...

Science(Help NOW, Pls)
organisms in which domain live in every environment? pls help, im stuck on this one. :S

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

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

(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

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 ...

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

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

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.

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

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!!!!!

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

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.

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

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

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.

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 ...

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!

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 ...

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

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

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

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 ...

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

Calculus
S=integral sign S3x(4-x^2)^1/2 use trig substitution I am confused I got x sin(sin^-1(x/2))+cos(sin^-1(x/2))

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

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 ...

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

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

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 ...

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

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

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

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.

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.

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 + ...

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?

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...

mathvariation 2(steve,reiny,reed)pls I need help!
pls steve I dnt understand! Explain how d alphabets? Wat are they representing?

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

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