# Math(Please help)

183,433 results, page 62

### Trigonometry Urgent!

I am writing a paper on the 8 trigonometric identites but can't find any information on them. Please does anyone know of any websites that would have things like their history, development, applications in ancient times, origins, etc. Please help. Urgent!!!!

### chem

for 2Al2O3----> 4Al(s) + 3O2 the question is what is the heat change for the formation of 1 mol of aluminum oxide from its elements? Al2O3:-1676.0 O2:0.0 Can someone please explain how to complete this problem step by step please??

### Computer Science

Help me please! I need help with Floating Point Notation when converting biary and regular numbers! Please. I just need some help and would appreciate it greatly. Also instant message me at TRbal10. Thank you

### Pre Algebra

Please help! This is due tomorrow... I don't understand how "Counting Outcomes and Theoretical Probability" works! There's a question that says: You toss two coins. Find P (one head and one tail). Please help!

### grade 12 english

please explain...metaphors compare two things...example "gathering clouds" and "raging storms" ...am I comparing these to obama's oath...i need to know if i state this as imagery or a metaphor...please explain

### POLYNOMIALS

I'm really sorry, i'm preparing for O levels, so i have a lot of maths questions to ask... please excuse me... Question: Find the value of k for which a-3b is a factor of a^4 - 7a^2b^2 + kb^4. Hence, factorise completely. How do i even find k??? Please help thankyou!

### psy

hi, i need help on this assigments can you help me please i need to find the following definitions please help me. 1. The danger of overdiagnosis 2. The power of diagnostic labels 3. The confusion of serious mental disorders with normal problems 4.The illusion of objectivity

### 12th grade A.P. Government

My teacher has selected us to be in particular groups and I am a conservative. So I need to address Education and state the issues like how a conservative would. But I have no idea about it. Can someone please help me??? Please....

### Algebra

Help please-I'm doing something wrong- Solve 8x^2 + 6x + 5 = 0 I'm doing square roots and all the steps but it's not working out I come up with -0.38 + 0.5 and -0.38 - 0.5 But it's not right when I go to put it back in. Could you please show the steps-these problems really ...

### Algebra-Please check-I must have done something wr

Please help-What is the equation of the ellipse with foci (0,6), (0,-6) and co-vertices (2,0),(-2,0) My answer and logic is below but it can't be correct I thought the answer would be x^2/4 + y^2/40 = 1 but that can't be because the choices are: x^2/1 + y^2/40 = 1 or x^2/1 + y...

### algebra

I NEED HELP SOLVING THIS PROBLEM ,PLEASE EXPLAIN AND SHOW HOW TO SOLVE the answer ."I HAVE 63 LITERS OF HYDROGEN PEROXIDE, HOW MANY TEST TUBES CAN I FILL IF EACH CONTAINED 7/8 OF A LITER?" PLEASE SHOW ME YOUR WORK. AND THANK YOU IN ADVANCED.

### Physics Someone help please!

An example of the neutron absorption reaction is . 1 0 n+10 5 B-->7 3 Li+ 4 2 He The rest masses of each particle in atomic mass units (u) are 1 0 n= 1 u 10 5 B=10 u 7 3 Li =7 u 4 2 He= 4 u where 1u=1.66x10^-27 kg. calculate Q Q= in MeV I have the same question please ...

### help with chemistry please

Can someone please explain how to do this An equilibrium mixture at 225∘C contains 8.0×10−2M NH3 and 0.20M H2 for the reaction 3H2(g)+N2(g)←→2NH3(g) If the Kc at this temperature is 1.7×102, what is the equilibrium concentration of N2?

### Social Studies

Has the effort of Westerners to aid the rest of the world done more good than harm? Its a opinon but i would like a answer please. Please make your answer at least 6 sentences. Thank you very much

### physics please help

A student throws a baseball from the ground to the top of the flag pole. If returns to the ground in 4.00s what it the height of the flagpole? Please show all work need help have a test comine up

### physics please help

A student throws a baseball from the ground to the top of the flag pole. If returns to the ground in 4.00s what it the height of the flagpole? Please show all work need help have a test comine up

### History

one more question sorryy xD The process established by the Constitution for electing the president. A popular vote B primary election Cthe Electoral College Im thinking C but this question i don't get so can you please explain it please

### History PLEASE HELP

How did the supreme court decision in Worcester v Georgia and the Indian Removal Act lead to the removal and resettlement of native American groups? please help me with this all i want is help getting started or a sample essay

### Math

Hello everyone. I have a math problem that I need a bit of help with please. Ava wants to ride the Rip Ride Rocket roller coaster at Universal Studios. She knows that she has to be at least 40 inches tall. If h represents the height of the children that CANNOT ride the coaster...

### Math-- Please check

A package of 16 tea bags costs $2.29. Find the unit price in cents per tea bag. Round to the nearest tenth of a cent. I get 14.3 cent Will you check to make sure I am correct? How do I round it to the nearest tenth? Or is it already rounded to the nearest tenth? Please help! ...

### Please answer two math questions!!!

10. From the 2010 census data, the population of Texas was about 2.5 x 107 people. Florida’s population was about 1.9 x 107. Idaho’s population was about 1.6 x 106. Which of the following statements is true? a)Idaho has a larger population than Florida. b)Florida has a ...

### PLEASE HELP ME! PLEASE!

1 )3x + 8y = 1 7x + 4y = 17 Answer: (3,1) 2) -3x + 5y = -7 9x + 2y = 38 Answer: (4,1) 3) 7r + 3s = 13 14r - 15s = -16 Answer: (1,2) 4) 2x - 7y = 42 4x - 14y = 64 Answer: No Solution ?? 5) 9x + 12y = 15 3x + 4y = 5 Answer: Identity ?? 6) 2 = 4s - 3t 2 = 12s - 9t Answer: No ...

### Math Please Help

Simon travels north and south from Main Station. The distance, in km, of the train from Main Station is modeled by the function 𝑑(𝑡) = 𝑡 3 − 9𝑡 2 + 6𝑡, where North is positive and South is negative. Time elapsed after the start of ...

### To Brady, please check

Please check my answers down below.

### CALC PLEASE HELP

Suppose that y′=ky, y(0)=7, and y′(0)=4. What is y as a function of t ? PLEASE EXPLAIN

### As physics

Could a physics expert please help out with my other questions please?

### 3rd grade

This is my sons math problem I am not good at math please can you help me and show the work for the calculations " ALI MADE A MODEL FOR 624 USING 6 HUNDREDS, 2 TENS, AND 4 ONES. WHAT IF ALI HAD NOT HAD ANY TENS? HOW COULD SHE HAVE MODELED 624 WITHOUT USING TENS?...

### math

I have a couple of math questions that i cant seem to get to work out. can someone help me please.? 1.) (x/x+6)-(6/x-6)=(x^2+36)/(x^2-36) 2.) (r-2)-(2-r)=0 3.) add (8/ty^2)+(9/t^2y) 4.)add (7/w)+(8/w^2) 5.)add ((r+10)/r)+(r/(r+10)) 6.) divide ((z^2-1)/16z+16) / ((z-1)/4) 7.) ...

### algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

### algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

### algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

### algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

### algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

### algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

### algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

### algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

### algebra

can some one please help figure this problem out Determine whether each expression is a polynomial.If it is a polynomial, state the degree of the polynomial. 5x^3+2xy^4+6xy can someone please help me

### science.. please help!!

i need to find two articles in anything to do with an ecological concern (ex. pollution as a threat to our ecosystem)... please help me find a site, i can't find any good ones!!

### substitution and elimination methods

Can someone please help explain this, my notes aren't helping me much. Given the following system of linear equations: {x-4y=20 -3x+4y=-12 The solution to the system is: The system is: The equation is: Please help

### Math

Find the area of the triangle with the base 1 2/5 yards and height 5/9 yards. The area of the triangle equals half of the product base and height. The area is ____yd^2 (Type whole number or a simplified fraction) I came up with 35/108 did I do the math correctly, and if not ...

### Physics-Please check and I need help

Please help set this up- A person goes into the electric field and has an object with a charge value of 4.2E-6C. At a distance of 10m from the object that's responsible for the elctric field, the person sees a force of 8.0N on the object they have. What is electric field ...

### 6th Grade Math Help & FAST!!!

I only have 2 questions. 1 is multiple choice and one I have to type so please help. 1. Which set of output values correctly completes the function table? This is the function table: y= 2x - 4. Input (x) 6, 2, -4. Output (y) those three slots all have question marks. A. 8, 2...

### please help

You know that a cetrain electroscope is charged because the foil extends when there is nothing near to influence it. when a balloon rubbed with fur is brought near (but not near to change the net charge on the electroscope), the gold foil is seen to move slightly downward. Is ...

### Math - Calculus

Find the equation of the non-vertical asymptote. What is the smallest value of x at which f(x) intersects its? -6x^3 + 2x^2 - 9x +3 / -5x^2 +9x - 4 1)Find the equation of the non-vertical asymptote. 2)What is the smallest value of x at which f(x) intersects its non-vertical ...

### Math

Mrs. Lincoln budgets her monthly take-home pay. The remainder she deposits in her savings account. She budgets 1/3 of her take-home pay rent, 1/8 for car expenses, 1/6 for food, 1/24 for insurance and 1/16 for entertainment. What is Mrs. Lincoln's monthly take-home pay if she ...

### Math Please explain

Mike’s Sporting Goods sells elliptical trainers under two payment plans: cash and installment. Under the installment plan, the customer pays $90/month over 5 years with interest changed on the balance at a rate of 19%/year compounded monthly. Find the cash price for an ...

### Math Functions

Hello. Could you please help with my math homework...? An online bookseller gives the following information for their shipping information: "The shipping and handing charge per order is $4, plus $1.50 per book." Let x = the number of books that someone orders. Let S(x) = the ...

### Math check my answers

1. Evaluate. 8d - 10 for d = 4 A.32 B.22*** C.26 D.46 2. write an algebraic expression for the sum of 3 coins and c coins. A.c + 3*** B.c/3 C.3c D.c-3 3. Find the solution of the equation from the given numbers. x - 2 =16: 14, 18, 21, or 12 A.12 B.14 C.18*** D.21 4.use mental ...

### Calculus PLEASE HELP! PLEASE PLEASE PLEASE

A long, straight wire of length 2L on the y-axis carries a current I. According to the Biot-Savart Law, the magnitude of the magnetic field due to the current at a point (a,0) is given by B(a)= (mu sub 0 multiply by I) divided by 4pi times the integral from -L to L of (Sine ...

### Science

Nitrogen in air is int he form of two nitrogen atoms fastened together, N2. Is Nitrogen an element or is it a compound?Explain. PLease help me! I need help really badly! please help !!! Fast!!

### spanish

please help me with this one "¿Qué usas con esos pantalones?" "_____." a. uso un bolso b. uso la manga c. uso el vendedor d. eso un cinturón please explain the question to me

### Science

Explain the energy transformations during skydiving Explain what happens once a skydiver reaches terminal velocity please help...i cant find any information...please note that I need to EXPLAIN

### Math

Jake can carry 6 1/4 pounds of wood in from the barn. His father can carry 1 5/7 times as much as Jake. How many pounds can Jake's father carry? Answer: 1 3/28 Can you please double check the above answer. I don't know if it is right or wrong. 2. A glass can hold 3 1/3 cups of...

### Chemistry(Please respond)

Calculate the pH of an aqueous solution of 0.15 M potassium carbonate. I know that pH = -log(H30+) but I am not sure how to start this problem. Chemistry(Please help) - DrBob222, Saturday, April 14, 2012 at 11:09pm Hydrolyze the CO3^2-. CO3^- + HOH ==> HCO3^- + OH^- Do an ...

### psychology

Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. Once YOU have come up with a response to YOUR questions, please re-post and let us know what you think. Then someone here will...

### SCIENCE

could you please help me on some information about this topic please. Ihave a presentation to do on this and i need scientific research or journals as references to add to my powerpoint. An Investigation of the Impacts of Current on Shoaling and schooling Behavior in Anchoa ...

### math: inequalities

2b < 8 My answer is that b is less than or equal to 3.9. Is that correct? If not, can you explain why it isn't, please? b< or = to 3.9 is correct, but you could just say b<4. Thanks :) i don't understand it can you show me the steps? I don get this problem: 4(x-2)<...

### math

i need help on a proof, can anyone help? please HELP!!!! me on the difference between 3/4 and 1/3???????? You have to find the common denominator of 3 and 4, which can be 12. The first fraction becomes 9/12 and the second becomes 4/12. 9/12 - 4/12 = 5/12.

### Math.

I JUST can't figure out the answer! Can someone please help me? What is the next number in this sequence? 52, 28, 33, 63, 73, 23, 56,... Ah ha! Nevermind, I just got it, 89, I think :) Thanks anyway :)

### math

How do you figure out the slope without drawing the graph? I kinda forgot. I have a chart with data, and I need to know the slope please help thank you

### i need help..algebra/math

solve by using the quadratic formula: x2 plus x minus 2 equal 0 I know the formula is a=1 b=1 c=2 I'm having trouble solving...please help.

### math

my question in (slope) find the coordinates of the vertices of a triangle so that the slope of all three sides are positive ??? please explain your answer .

### Math

Please help, this has me so stumped. What about this one then. Following the pattern shown in the number sequence below, what is the missing number? 1 - 8 - 27 - ? - 125 - 216 36 45 46 64 99

### functions math

hi can any one please help me solve this question? logbase2x+logbase2 3= 3 i factored the left side but i have no idea what to do with the right side.

### math

Tom drives from his house to his office. He drives 64 km east and then along the new Square Route Expressway. please Explain your answer...

### Math

Use the cross product to find a vector perpendicular to each of the following pairs of vectors. (2, -1, 3) and (1, 4, -2) Can someone please explain this step by step?

### Math-Angles+Shapes

I really don't get how like obtuse triangles are the way they are...like who they get measured but mainly I need help on the subject. Please help me understand it!

### MAth

iFind the first and third quartiles, Q1 and Q3, of the following set of numbers. 13, 4, 12, 16, 8, 14, 8, 3, 10, 8 A) 3; 16 B) 4; 14 C) 4; 12 D) 8; 13 need help with the top problem. help with this too please: Find the Find the reciprocal of - 1/5 (15)

### math

Find the exact value of the shortest distance from the origin to each line. y=x-4 is the equation of the line. When i do the problem I keep on getting 0 but that's not the answer!!! please help me.

### math

THIS IS SYSTEM OF EQUATIONS:SUBSTITUTON Y=2X-8 X-Y=2 I KNO THAT U COMBINE SO IT WILL BE X-2X-8=2 WHICH WLL BE 3X-8=2 BUT I DON'T KNO HOW TO FINISH TH REST......CAN SOMEONE HELP ME....... IF DID SOMETHING WRONG PLEASE TELL ME

### math

the diameter of a cylinder is one half the height. Express the total surface area as a function of the height h. Can someone please help me with this question

### the subject with numbers

Julie is paid a comission of 3% on all sales. Last week, she earned $82.74. What were her total sales? How do you solve this math question? Please and Thank you!

### Math

Consider the function f(x) whose second derivative is f(x)=10x+2sin(x). If f(0)=4 and f'(0)=4, what is f(x)? Please do not include the constant (+C) in your answer. I got f(x) to be (10/6)x^3-2sin(x), but don't really know what to do with the f(0)=4

### math

a rectangular field is to be enclosed with 600m of fencing. Find the dimensions of the field that will give you the greatest area. please help me.. exam tomorrow!:(

### math

I've worked these problems but I was just wondering if someone could check over them to see if they're correct...if not please help! (u-2)(u+7) my answer: 7u^2-49u (5t-4)^2 my answer: 25t^2-40+16 Thank you :)

### 3rd grade math

1)which shapes are polygons. 2)which shapes have atleast one curved side.if you know this please help me as soon as posible because this is my homework

### 3rd grade math

1)which shapes are polygons. 2)which shapes have atleast one curved side.if you know this please help me as soon as posible because this is my homework

### math

i am doing a SSAT/ISEE Prep... not a dignostc but just a prep. I need help desperately. Please help me within the next few minutes, somebody!

### chemistry/math

I don't know where to begin with this problem...help please. if it takes 24.75 cal to raise 15 grams of iron from 50 degrees C to 65 C, what is the specific heat capacity of iron?

### Math

How do I transform this into simple radical form... I have no idea how to do this could you please tell me the logic behind how you do this and step by step thanks (5^(1/2)-3^(1/2))^2 thanks again

### math

PLEASE HELP Could someone check my answer? I need to figure out the equation of the circle given the center of (-9,0) and radius of 7. (x-(-9))^2 + (y-0)^2 = 7^2 answer(x+9)^2 + y^2 = 49 is this correct?

### math

Me and my mom are having an agrument about how to solve this problem. 27 / (5+4) * 19= she says the answer is 57 and I say the answer is 6 with a remainder of 9..can you please tell me who is right. Thank you.

### math

Find the common ratio and write out the first four terms of the geometric sequence bracket (3 to the power of n-1)/(10) bracket ???? please help me!

### math please help

The electricity costs of a business from $15,000 one year to $16,000 the next. To the nearest whole percent, what was the rate of increase?

### math(please help)

1) Find two values of o that satisfy the equation. Give your answers in degrees and radians. Do not use a calculator. (a) sec o = 2 (b) sec 0 = -2

### Math

I checked the problem but I didn't understand the answer how could you do?, because what happened with the fractions? Estimate the result of the following problem as a whole number: 4 1/43+2 15/16 -1 24/26+ 5 11/12 -3 3/61 Can you explain me, please....?

### 5th Grade Math

I have bases with more than 4 sides each. I have 5 faces. What am I? My answer is pentagonal prism. Is that correct? Please advise. Thank you

### math

32x^2y-64xy-4x^3y. When I factored out the GCF, I got 4. When I try to factor is completely, I got lost and confused. Can someone please help???

### math

still having a hard time understand these? please help? Logx10 + logx8-logx5=4 Log3256-log327=x Log 2+ 3log 5-log 25=x

### math

the length of a rectangle is 3cm more than twice the width. the perimeter is 84cm. find the length Please show me the steps on how you get the answer. Thanks

### Math

Too lazy to use the calculator, lol. 22 times (90) divided by 30 times 2,000 to the 4th power plus six. Answer please!

### math

find the slope of the line, if it exists: coordinates are (-1,-5), (1,-5) I am doing something wrong because I either get 5 or if I work it another way I get 0 m= either 5 or 0 Which one is it if any? x1-x2/y1-y2 Can you please help me through this?

### Math

are these right? im suppose to use like terms. 5z + 2(x + 3) - z dont solve it just simplify it. please give me a step to step process?

### math

Please solve -2x+7>22 -2x+7-7>22-7 -2x>15 -2x/(-2)<15/(-2) Switching the order of the inequality here is essential to keep the solutions true for the inequality since I divided by a negative #. x<-7.5

### math grade 11

I need help with this question determine the values in k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros. Check these values in the original equation. i don't get how to do it please help me.

### math grade 11

I need help with this question determine the values in k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros. Check these values in the original equation. i don't get how to do it please help me.

### 6th Grade Math

Estimation division. Problem: 28,622/921 My estimated problem: 27,000/900 Is this right?? If not, please explain. Thanks!

### Math-Advanced Functions

I am having trouble figuring out how to solve this logarithms. Could someone please help! log2(log4x)=1 and solve for x and y: (1/2)^x+y= 16 logx-y8=-3

### Math

Hi, I have to write a research paper and I decided to write about the history/importance of imaginary numbers. I don't know how to get started though, can you please help ! :) thanks