# Math(Please help)

183,433 results, page 67

### math urgent help needed!!

I am so sorry but this homework is due in half an hour. Please help me! A smokestack deposits soot on the ground with a concentration inversely proportional to the square of the distance from the stack. With two smokestacks 20 miles apart, the concentration of the combined ...

### Math Algebra

I am stuck on simplifying four problems, I cannot figure out which steps i need to make. Can you please help me. 6x^4 - 8 2a² + a²b + ab + 1 12m²p + 35nq³ a²b - a² - 2b -2

### Math/Sciance

Can someone please give an example of how i can use this formula in a word problem... Work out (J) Percent efficiency(e)= ____________ x100 Work in (J)

### Math/Science

Can someone please give an example of how i can use this formula in a word problem... Percent efficiency= Work out (J) _____________ x100 Work in (J)

### math algerbra 2

blah this is making no sense, please help me: If you switch the domain and range of any function, will the resulting relation always be a function? Explain your answer with examples.

### Math

Can some one help me solve this please. 2e^5x = 712 log5 80= the five is little next to the log and 2logx=log(6x-90)+1 thanks I would really appriciate it if you could help me out

### math

does withdrawls fall in the catergorie income statement.if not please correct. the other two choices are statement of changes in owner equity or balance sheet.

### math

My teacher said we are supossed to solve this using systems of equations: Let a, b, and c be real numbers such that a-7b+8c=4 and 8a+4b-c=7. Then a^2-b^2+c^2= ? can someone please help?! i don't know what method to use to solve this or where to start

### math!

My teacher said we are supossed to solve this using systems of equations: Let a, b, and c be real numbers such that a-7b+8c=4 and 8a+4b-c=7. Then a^2-b^2+c^2= ? can someone please help?! i don't know what method to use to solve this or where to start

### math

A store owner buys 40 shirts for $600. She then adds 40% to her cost and tags each shirt with the same selling price. What is the amount of profit for each shirt? Please help me!!!

### Math

A motorist travels 108km in 2hrs 15mins. if she travels at a steady speed, find how far she goes in 1 hour. PLEASE SHOW ALL WORKING

### math

An item costs $39.95. Add 7% to the price for tax. Then add $5 for shipping and handling. Write an expression using these numbers that indicates the total cost. Please help me! Thanks!

### math

can someone please help me with this elimination methods problem? 0.05x+0.25y=11 0.15x+0.05y=12 solve using the elimination method and give the ordered pair...

### Math / Algebra

I would like to know if I got my answer right. I am supposed to find the LCM of 11(t-5)and 55(t-5). I thought that the answer was 11t-55 but I am a little bit lost can you please help me. Thanks

### math

*simplify by combining like terms, if possible. then, remove the GCF and factor fully. 2x^2-21x+36+x^2 =3x^2-21x+36 ...i'm not sure what to do after that, could you help and show the steps please

### Math 115

Please check answer. The sale tax rate in a state is 7.5%. If you pay a tax of $17.50 on an item that you purchase, what is its selling price? 17.50*7.5=$131.25 is this correct?

### Math; Pre- Algebra

I neede help with how to solve equations with variabls on both sides. Can you give me some examples and work them out step by step?? Please!! :D

### Math 3

graphing log functions for y=log12^x I don't have a calculator for this and I would like to know how to work this problem on paper so I can graph it to my chart. Can someone please help me with this problem?

### 5th math

Estimate and solve. 214+182= Estimate___________ Solution____________ 1,532-176= estimate:_____ can you please show the work too thanks!! Solutionz:____

### Math

Hello, I have two more rational exponent question that I wanted to verify please: 4x^3y^-2 _________ 2x^-1y^4 = 2x^4y^6 is this correct? 2nd question: [w^1 / w^-3] my answer: = [w^(1)(-4)/ w ^ (-3)(-4)] = w^-4 / w^12 = w^12 / w^4 = w^3 / w Is this right?

### MATH HELP

A line with an undefined slope passes through the points (-2,1) and (p, q). Which of the following points could be (p, q)? A. (1,0) B. (0,1) C. (0,-2) D. (-2,0) Help Me, I do not know how to figure this out????? A person tried helping me with this, but I didn't understand what...

### MATH

A line with an undefined slope passes through the points (-2,1) and (p, q). Which of the following points could be (p, q)? A. (1,0) B. (0,1) C. (0,-2) D. (-2,0) Help Me, I do not know how to figure this out????? A person tried helping me with this, but I didn't understand what...

### Math

A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help.

### math

A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help.

### Math

A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help.

### math

A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help

### Math - Graphing Logarithms function

Graph the function below. Determine the domain, range, and vertical asymptote. Please show all of your work. f(x) = log2(x-4)

### 5th grade Math

Clue1: i am greater than 500 but less than 1,000. Clue2: My square root is a square number. Also please explain your answer. Thank you.

### math

erin is thinking of a 3 digit number.it uses the digits 1,7,and 4.how many numbers can you make that are even?how many can you make that are odd?explain. please answer as soon as possible!!!!!! :)

### MATH 7th GRADE

Would someone please be kind enough to check the answers for these problems?Last round for tonight. Thank you. 1. 3/16 - 1/8 = 1/16 2. 151/4 -11 5/8 = 3 5/8 3. 2 x 3/7 = 6/7 4. 1/2 x 7/8 = 7/16 5. 1 3/8 2 1/2 = 3/7/16 6. 1/2 divided by 2/3 = 3/4 7. 8 1/4 divided 1 3/8 = 333/32

### Math, Please Help!!!

Solve the Trigonometric equation for all solutions between [0,360)degrees. 2Sinx + 1 = 2.6635. Solve for x. does x equal 56.28degrees and 123.72degrees?

### Math - Exponentials

How do I approach the following problem. Please don't give answer but just guidance as to how to approach these in general. I need to be able to solve without a calculator. 3^(2x+1)-16(3^x)+5=0

### math

Marna wants to find the values of x for which the funciton below will have a value of 10. f(x) = x^2 + x - 20. Which of the following shows the correct factorization of this funciton for f(x) = 10. A. (x + 5) (x + 4) = 10 B. (x - 5) (x - 4) = 10 C. (x + 6) (x - 5) = 0 D. (x + ...

### Math

What is better buy? A square 8in. pizza that cost $10 or a round pizza with a 9 inch diameter that also costs $10 Please explain how answer is found.

### Math

I need help on how to solve this type of problem please. 29.)Solve the inequality and express the solution in terms of intervals whenever possible. 1/(x-2) ≥ 3/(x+1) THE ANSWER IS: ( -∞,-1 ) U ( 2,(7/2) ]

### Math

If 6 is increased by 4 times a number, the result is 68. A.Write and equation for this situation. B. Solve for the answer. I got 6+4x=68 for the equation, but I'm not sure whether or not x=15.5, or if that is what the question wants me to find. Help please!

### Math

Please help i really need help!! Celine wants to know the width of the pond. She drew the diagram shown below and labeled it with the measurements she made. How wide is the pond? thnx!! :)

### Math Grade 12 Advance Functions

I need help understanding equivalent trigonometric functions! Can someone PLEASE help me because the test is tommorrow and the internet or my textbook isn't helping at all!

### Math- please help

which expression is equivalent to 3/4x-24. It is a multiple choice questuion a 1/4(3x-48) b 1/4(3x-24) c 3/4(x-32) d 3/4(x+32) I did it by trying each one out I got c 3/4(x-32) mult 3/4 by both 3/4x-24 Is this correct on how to find the answer and is it correct? thanks

### math please

The curtis car traveled an average of 21 miles per gallon of gas. At that rate, how far could the car travel on a full tank of 21gallons

### Math

Use a double or half angle identity to find the exact value of the following expression: if cos x= 4/5 and 270° < x < 360°, find sin 2x Please help! Thanks

### Math

Can you arrange the numerals 1 to 9 (1, 2, 3, 4, 5, 6, 7, 8 and 9) in a single fraction that equals exactly 1/3 (one third)? Could someone explain how you get the answer to the problem, please don't just say the answer!

### consumer math

A trust is an agreement whereby a person or bank manages the estate according to the specific directions of the owner of the estate. True or false i don't know it can you please help

### Math Factoring with 3 VARIABLES?!?!

a^2-b^2+8bc-16c^2 25-m^2-12mn-36n^2 x^2-a^2-y^2-2ay I know that you have to group them 3 and 1 and then you have to do difference of squares but I am utterly lost how to go about it. Please help!

### math

1-sin^2x/cosx = sin^2x/2sinx Please help me figure out this one, can you show all the steps, I am really confused. Your help is very much appreciated. Thanks

### math

A circle of area 25 pi is graphed in the coordinate plane. If its center has coordinates (8,0), which of the following points MUST lie on the circumference of the circle? a. (0,0) b. (0,5) c. (16,0) d. (3,0) e. (0,8) please answer and explain

### Math 2

Amira decides that she wants the 10 molds to have a square base. How many possible molds can she use? Volume is 28 cubic centimeters when it was a rectangular prism. Please answer thanks

### Math (6)

Find the area of the following two curves. y= sqrt(x) y= x-2 Note: People have been telling me that the two lines do not intersect but they do there has to be an answer. please help me. Thanks

### math

The distance between points A and B is 10 units. If a has coordinates (4,-6) and B has coordinates (-2,y), determine the value of y. Please show work and explain. A.-6 B.-2 C.0 D.1 E.2 This is what I got so far: 10= square root of (4-(-2))^2+(-6-(y))^2

### Math

Tell whether the function is linear. Then evaluate the function for the given value of x. 6.) f(x)= 3-3x; f(2) 7.) f(x)= | x+2 | ; f(-4) 8.) f(x)= 2/x-2; f(6) 14.) f(x)=2/3x-5 ; f(9) Can someone help me with these^^. please write the QUESTION # SO I know which one the answer ...

### math

We did this qs in class so we change the equation into the vertex form Here is the solution. Y=3x^2+30x+41 y=3(x^2+10x)+41 Y=(x^2+10x+25-25)+41 Y=3(x+5)^2-34 I understand everything expected I don't know how we get -34, can you explain please?

### Math

A cylinder has volume of 339.3cm^3 and height of 3cm. What is the radius? Please help! Can you show me the formula to use and the steps involved in getting the answer? Thank you for your time.

### Math

For how many values of n where n is a positive integer less than 10 is n+1/2 an integer? A) None B) One C) Three D) Four E) Five Please I would like some help explaining how to get the answer :)

### Math

Convert 2yd, 2ft, 5in. to centimeters. Convert 10yd,1ft, 7in. to meters. I tried it twice but still didn't get it right. Please help me out.

### Math.

A new $20 weighs approximately 0.5 gram. Write a linear function that shows the weight of x $20 bills. - Part b. How much do 120 $20 bills weigh? Please Help!!

### Math

One of two similar triangles has an area of 1/4 times that of the other. What is the ratio of its perimeter of the triangles? (I know the answer but I don't know the solution, please explain. Thank you very much!!)

### math please help

Find the area of triangle ABC if AB = BC = 12 and <ABC = 120 degrees Should approach this with SSS similarity? If yes will the answer be clear or will i need to manipulate it, and how.

### Math

Please help with trying to solve the following; in particular how to get the correct equation set up. The perimeter of a square is 64 cm and the area of the square is 192 cm. What is the length of width of the rectangle? Thank you for your help.

### Math

suppose you had a very small set of numbers that contained only 0 and 1 would this set be closed under addition? if not give a counterexample. please help me

### math

Write the slope-intercept (y = mx + b) form of the equation from the information given. ~~Slope equals 2 and the line goes through the point (-1, 3) Can someone please show me how to do this?

### Math

A can containing 3 tennis balls has a volume of 128/9pi cubic inches. If the height of the cylinder is 8in., what is the diameter of each tennis ball. Please explain how to do this.

### Math

What is the best estimate for the quotient. 5,397 division sign 62 a. 80 b. 90 c. 800 d. 900 My answer to the above is b Can you please double check my answer and let me know if I am right or wrong

### Math- HELP!

Build a table to estimate lim sin(1/x) as x approaches zero. Use multiples of pi. I built a table, but do not understand why this limit does not exist. Please explain! Thank you!!

### Math!

Describe how you would estimate the square root of a number that is not a perfect square without using a calculator. Can someone please explain? I need some help.

### Math

Rectangular Prism: Length: 41 ft Width: 32 ft Height: 49 ft 1. Find the surface area for the given prism. 7,154 ft^2 2,624 ft^2 9,778 ft^2 8,432 ft^2. Help please because I'm not sure.

### Math

Hello! I have a question. What is a table of values for y=x-8? Please tell what free calucators show work! I've been on this question for hours and I'm really frustrated!

### Math

Suppose that the half-life of a substance is 250 yrs. .If there were initially 100 g of substance .How much will remain after 500 years??with solution please

### math

Use the distributive property to write an expression that is equivalent to the example below: 5(2x + 7) I think my answer is... 45.....How I got this answer was 5 x 2 + 5 x 7=45 10 + 35 = 45 Can you please double check my work?

### Math

Find the volume of the solid of revolution obtained by revolving the plane region R bounded by y= x^5, the y-axis, and the line y=3 about the x-axis I've gotten 15/7(3^(2/5))pi, but it's not right. Please help

### math

please help me im really confused i keep changing my answer and i have no clue what the answer is write a rule for the function represented by the table input (x) 0, 1, 2, 3, 4, output (y) 3, 6, 9, 12, 15,

### math

There are 3 boys for every 4 girls in school. If there are 200 girls, how many pupils are there in all? Help me please. This is my homework and I need it right now because we have a class for tomorrow.

### Math

The radius of the larger circle is 9cm. The diameter of the smaller circle is 11cm. Find the area of the shaded region. I don't understand this questions at all please help.

### Math

ht t p: / / imgur. c o m / a/ Fn4gh I really need help with this question, I believe it is C, can someone help please? P.S: put the link in your web browser and remove the spaces to get access to the link, thank you.

### Math

List three different ways to write 5^11 as the product of two powers. Explain why all three of your expressions are equal to 5^11 Need some help Please!!

### math

the debit amount to payroll tax expense represents: A. the employers portion B. the employees portion C. Both D. None of the above. I choose A, but thinking D. Please Help. thanks

### math (connections academy)

has anyone done the Unit 4 Lesson 11 Real Numbers and the Coordinate Plane Unit Test??? i need the answers so i can check if mine are correct!! please help!!!

### TO ALL STUDENTS

If you are able to help another student with his/her homework, please do. But if you cannot, please don't post anything. If a teacher sees a post has been answered, he or she might think the original student doesn't need help anymore. Thanks. =)

### Algebra

Hi. I need help on this homework problem. I don't know where to start of how to do this. Will you please help me? Find the value of digit A if th give-digit number 1243bis to be divisible by both 4 and 9, with A not equal to B. I don't understad this at all. I need your help ...

### Chemistry

Phenol (abbreviated HOPh) is a weak acid with a Ka= 1.29 X 10^-10. What is the pH of a mixture made by mixing 100.0 ml of a 0.700 M solution of phenol with 70.0 ml of a 1.00 M solution of NaOH? Help please and please show work... I'm so confused.

### Chemistry-please help!

When sucrose is fermented to produce ethanol why is it not possible to obtain a final solution containing more than 10-15% ethanol? Does this have to do with azeotropes? However, I thought this was possible? I am confused, please help.

### Chemistry-please help!

When sucrose is fermented to produce ethanol why is it not possible to obtain a final solution containing more than 10-15% ethanol? Does this have to do with azeotropes? However, I thought this was possible? I am confused, please help.

### PERSON!!!!!

I have no money at all no credit card or checks or anything! So can someone please tell me where to get a free background check or free record check?? I really need this please!!

### science

Please help me with this. why is it that blood pump away from the heart under pressure? why is it necessary for blood to be oxygenated before pumped to the cells? Please this question is under the topic circulatory system.

### college algebra--need help please!!

solve the equation in the real number system. 2x^4-23x^3+75x^2-88x+28=0 What are the real solutions of the equations? please show work. I do not know how to work this at all

### Algebra please help

A grocery store sells snacks by weight. A six ounce bag of mixed nuts costs $3.60. Predict the cost of a two ounce bag. Please help answer

### Algebra 1- Please help whenever you get the chance

Graph the function shown by the table. Tell whether the function is linear or nonlinear. x|y 0|1 1|2 2|5 3|10 i'm sorry, i don't have the graph, but is their any way this could work without it? Please help. Thanks

### please give me a site or answer!!!!

description of the population statistics LOCATION in South Carolina already found the age and race just having trouble with the location statistics please help!!!!!!

### Government Help Please

A major feature of newly created federal system of government is that it gained its power from ____ 1) the people 2) the national government 3) the state governments 4) the executive branch of government Please help.. thanks

### Geometry (Please check my work)

Find the image of O (-2,-1) after two reflections, first across the line y=-5, and then across the line x=1. I believe the answer should be (-1,-6) Can someone please confirm?

### Algebra

3. What would be the simplest way to solve the system? y=1/2x 2x + 3y = 28 A. Graphing B. Substitution***** MY ANSWER! C. Elimination D. Distributive 4. What is the solution of the system? y=-3x 2x + 3y = 6 A. (2,6) B. (-1,3) C. (-2,6)*****MY ANSWER! D. (1.5, -4.5) Please help...

### MATH PLEASE HELP

Bruce bought four packages of cornbread mix that each weighs x pounds. He also bought a package of biscuit mix that weighs pounds more than one package of cornbread mix. If the total weight of the items that Bruce bought is 31 pounds, what is the weight, in pounds, of each ...

### singapore math

My 3rd grade son get this math problem. It states that John thinks of a 3-digit number. What is his number? Use the clues below to find John's number. Every digit is different. The sum of all thedigits is 19. The difference between the hundreds digit and the ones digit is 6. ...

### Chemistry

Following question I need help with part b) Please verify my answer for part a) too if possible. Consider the following reaction for silver tarnishing: 3Ag2S(s) + 2Al(s) -> 6Ag(s) + Al2S3(s) a. State the oxidation number for each element in the reaction. 3Ag2S(s) + 2Al(s...

### Math Middle School

Please help. I do not have any idea about how to get started on this or finish it. I was told that the answer that I got was not the complete answer that was needed for me to submit. I do not understand how to extend the problem. I am not able to follow the pattern. This is ...

### Math(Please check)

evaluate the integral integral of 3 to 2 x/(x^2-2)^2 dx u=x^2-2 du=2x dx 1/2 du = x dx integral of 1/u^2 du -1/(x^2-2) Then I plug in 3 and 2 and subtract them form each other -1/(3^2-2) - (-1/(2^2-2) Is this correct?

### Math Please Help !!!!!!!!

How many yards must be gained after a loss of 3 yards to have a total gain of 10 yards?

### Math

Proving identities: tell wether or not f(x)=sin x is an identity (Does it simplify to Sin x) ? Please help (sin^3x)(1+cot^2x)

### math

Please calculate, I need help: [(600950000 / 884452900)(.1560) + (447000 / 884452900) + (247430000 / 884452900)(.0825)]

### math

The area of circle c is 81 pi . if the radius of the circle is doubled, what is the circumference of the new circle ? please answer and explain