# Math(Please help)

181,141 results, page 62

### 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

### math

Look at this trinomial 32a^4 + 18a^3 - 12a Write the polynomial as the product of the GCF of all its terms and a polynomial PLEase explain thanks

### math

you save 6 dollars on monday.each day after that you save twice as much you saved before.what table can i make to solve?please help!!!!!!!!!!

### math

you are desighning a poster that would be 3yd wide and 8 feet high. how much paper do you need in square feet. please explain

### Math(Please help! Thank you!!)

A piece of copper contains 3.6 x 10^8 atoms. What is the volume of the sample in units of liters? I know that first you have to get atoms to cancel out but them I do not know what to do.

### Math(Please help)

A piece of copper contains 3.6 x 10^8 atoms. What is the volume of the sample in units of liters? I know that first you have to get atoms to cancel out but them I do not know what to do.

### Math(Please help!!!)

A piece of copper contains 3.6 x 10^8 atoms. What is the volume of the sample in units of liters? I know that first you have to get atoms to cancel out but them I do not know what to do!

### math

My teacher makes us use this: => and <=> to symbolize the steps we use to find our answers, but I don't understand the difference. Can someone please explain it?

### Math

Can someone please help me figure out the mean, standard deviation, raw score, and z-score of 27,3,4,16,0.. Any help is super appriciated.. thanks sooo much.

### Math - translate (please check)

4. The sum of two numbers is 50. If twice the larger is subtracted from 4 times the smaller the result is 8. Find the numbers is it this x+x(2x-4=8)=50

### MATH--PLEASE HELP

Let W be the set of all continuous fuctions from the set of real numbers R to R. For f, g in W define f+g by (f+g)(x)=f(x)+g(x) and (f*g)=f(x)g(x). Verify that W is a commutative ring. Does W have unity? Why or why not?

### math

can u help me with a problem like this find the original price: tickets marke35% to $59.40 and find the percent of the discount or markup: $52 sweater on sale for $31.20 please help

### math

A rectangular prism has a volume of 4x(cubed) + 30 x(squared) +36x. What linear expressions can represent possible dimensions of the prism? Please explain.

### 8th grade math

I need someone to explain how to solve equations with two variables and tell me what the formula or equation is? Please help and explain. Thank you!

### MATH HELP PLEASE!

Graph these points. Angle DFG has vertices D (–2, 4), F (–3, 1), and G (–1, 2). Find the vertices of the image after the rotation of 180° about the origin.

### 5th Grade Math Algebraic Expressions

What is the algebraic expression for six is fifteen less than three times a number?Please Help.! -Keke

### math

I have to evaluate the limit of these problems and I can't figure them out! 1.) Lim x-> 1 x^2+x-2/x^2-x 2.) (please note that the -2 is not under the square root) Lim x->0 sqroot 4+h -2/ h

### aig math (please answer Ms.Sue)

other than the digit 3, what is a number that could belong in the box? 1'3=1___ "1'3" is in exponents my answer is 1 am i right if not tell me why

### math

If evelyn practices the piano for 45 mins every day, how many minutes does she practice the piano in one year? Please solve. Thx

### math

if a Ferris wheel with a radius of 22 feet takes 25 seconds to turn 4(pi)/5 radians, find the angular speed of the wheel! please help asap

### Math Ms. Sue please

Find the volume of a square pyramid with a base length of 9 cm and a height of 4 cm. 324 cm^3 108 cm^3 36 cm^3 152 cm^3 Is the answer 152?

### math

It takes Omar four minutes to eat eight carrot sticks. How long does it take him to eat one? Please answer and explain.

### math

If i earned $20 in January,$5 in February and $20 in March! What is the mean (average) amount of money earned for these 3 months? what is the answer and can you explain the question to me please

### Math Help please!

Find the area under the standard normal distribution curve for the following z-values: a. Between z= 0 and z = 2.01 b. Between z = 0 and z = -0.32 c. To the left of z = -0.73 d. To the right of z = 0.32

### Math Please help ASAP

how do you find the LCM (90, 120) by taking the quotient of the product of the numbers and divide by the greatest common factor of the numbers

### math help

question says choose which is greater or are they equal or not enough info fifty percent can be represented by n --- 50 a. n b. 45 answer is b is greater please tell me why

### Math

Brandon was paid $132.50 commission for his work selling $2650 of farm equipment. What was his commission rate? please explain clearly!!

### Math

Please help me solve this!! I'm really struggling with this topic Write an equation in slope intercept form with a y-intercept of 1 and is parallel to the given line

### math

If the length of a rectangle is increased by 25%, by what percentage should the width of the rectangle be decreased to maintain a constant area ? a. 5% b. 10% c. 15% d. 20% e. 25% please answer and explain

### MATH

please help me... 1. When squaring a complex number using De Moivre's theorem, there are two answers. TRUE FALSE i think it's true, but I'm not sure. thanks.

### Math easy please help

I just need help with rounding for making sure I round my answer correctly. Can you round this 1.299678785 to the nearest hundredth Thanks :)

### math

A box contains 12 lightbulbs. Find the number of ordered N samples of size 3: (a) with replacement (b) without replacement Also, please do Not solve.

### math

54. The volume of certain rectangular solid is 12x. If the dimensions of the solid are the integers x,y,and z,what is the greratest possible value of z? a. 36 b. 24 c. 12 d. 6 e. 4 please answer and explain

### math

you owe $3 to each of your six friends . Represent the total amount you owe as an integer I know the answer is $18 but I wondering how u get can someone please show me plz

### Math-please check

Determine if a true bioconditional can be written from each conditional statement. If not, gove a counterexample. 1. If a = b then |a| = |b| Is this true? 2. If y^2= 64 then 3y=24 Is this false? Because if you do -8 both of them aren't equal

### Math URGENT QUICK QUESTION

factor 9-6x-3x^2 The expression x^2-8x+k cannot be factored if k has the value A.)7 B.)0 C)-7 D)-9 Please show me how to do these questions step by step so that I can understand & learn

### Math algebra Help please

A right triangle has an area of 24 ft^2 the dimensions of the triangle are increased by a scale factor of 6 A.48ft^2 B.72ft^2 C.144ft^2 D.864ft^2

### Math HELP!!!!!

give 2 examples of mixed numbers that when multiplied by 3/4 give a product between 3/4 and 1 PLEASE HELP ME AND QUICK I HAVE A LOT DUE TOMORROW!!!!!

### help PLEASE math 112

Which has the greater effect on the surface area of a right circular cylinder - doubling the radius or doubling the height? how can I explain this

### Math! Please check!

Suppose angle PQR and RQS are adjacent angles. Whats side do these angles have in common? A: -> PQ B: -> SQ C: -> QR D: -> RQ My choice is D

### Math (trig)

A force of 35lb is required to hold a 72lb toolbox on an incline. What angle does the incline make with the horizontal? Please help me set this up.

### Math 6 grade

If you need to find the percent of a number, explain how you can predict whether the part will be less than, greater than, or equal to the number. HELP PLEASE

### Math Ms.Sue???

Find the surface area of the cone. Use 3.14 for pi. The diameter is 8in and the height is 7in please help asap!! And thank you for your time. Ms.Sue?

### Math

this is a difficult question for me please help! thankyou A sequence is defined recursively by an + 1 = 3an − n, a1 = 2. Find the first six terms of the sequence. a1 = a2 = a3 = a4 = a5 = a6 =

### Math

a lottery game has balls numbered 1 through 19. What is the probability of selecting an even numbered ball or a 4? Its hard one please anyone know how solve?

### math

how much flour will be needed to make 3 pies if using 1 3/4 cups of flour? i need two ways of solving this question please

### Math

I need help please. Assume that one dollor is equal to 1.14 euros. If 500 g of an item is selling for 25 euros, what is its price in dollars per kg?

### Math

Convert the rate 1000 fluid ounces per 2 hours to cups per minute. Please help, i have a test in 3 days!!!

### Math

Our difference is 6. We have a sum of 14. What numbers are we? We know number 10. How did you find 4? Please describe and solve the riddle.Write the number sentence.

### Math

You borrow $2,000 for a period of 4 years. You are charged simple interest at a rate of 3%. How much will you repay at the end of 4 years? Please answer. Thank you

### Math HELP!

For how many integers x does a triangle with side lengths 10.29 and x have all its angles acute. how do I know which side is the hypotenuse or does it not matter? Please give me an explanation.

### Math HELP!

For how many integers x does a triangle with side lengths 10,29 and x have all its angles acute. how do I know which side is the hypotenuse or does it not matter? Please give me an explanation.

### math

what is the value of -3/4-(3/-8) (the 3/4 fraction only has the - on the 3, not the entire fraction) a -1 1/8 B -3/8 C3/8 D 1 1/8 What I did is first find a common denominator making the equation -6/8-(3/-8)= -9/16 this is not one of the choices Can you please help. Thank you

### Math

I've been really struggling with this question, could someone please walk me through it. x+y=0.4276 (so, y=0.4276-x) x/23.947+y/56.105=0.01034 Solve for x.

### Math, please help

Write a real world situation that can be represented by the expression 8(t - 3). Tell what the variable represents then give a value for t and evaluate the expression.

### Math

Given the geometric sequence: 26, 2617, 26289, ⋯ Find an explicit formula for an, where the first term is a1=26. an= Find a6= please help out

### math

please help a five -digit number is made from the digits 6,6,3,3, and 3. write two numbers in which the places of the two 6,s are separated by a factor of 1000?

### math homework help please?!!

use the first six terms to predict the limit of the sequence a subtext n = n+6 / n^3 +6 (assume n begins with 1) a. 1/6 b. 6 c. the sequence diverges d. 0 e. 1

### 8th Grade Math

The value of y varies directly with x. When y = -12 1/2, x = 50. What is the value of y when x is 11 3/4, rounded to the nearest hundredths? Can someone please show me how to solve this problem?

### MATH *PLEASE HELP

Use Green's Theorem to evaluate C F · dr. (Check the orientation of the curve before applying the theorem.) F(x, y) = y2 cos x, x2 + 2y sin x C is the triangle from (0, 0) to (1, 3) to (1, 0) to (0, 0)

### Math - Coordinate Geometry

Find the equation of the line which passes through the point (6, -4) and is parallel to to the line 2x-3y+3=0. Please show working out as well, thanks.

### Math - Coordinate Geometry

The vertices of a quadrilateral are A(-2,3), B(5,4), C(4, -3) and D(-3, -4). Prove that ABCD is a rhombus. Find the area of ABCD. Please show working out, thanks.

### Math

On a certain map 1-1/16" = 300 miles. How many miles does 7/16" equal? Please clarify he process for solving his. What is he correct way to write the equation?

### MATH HELP QUICK PLEASE!!!!

A tree is 3,212 years old. How can you express this age in scientific notation with the lowest level of precision? 3•10^3*** 3.2•10^3 3.21•10^3 3.212•10^3

### Math

Please help with these 3 questions. 1. Suppose that y varies inversely with x, and y=3, when x=5. What is an equation fpr the inverse variation. 2. What are the solutions to the system? y=x^2+2x-45 y=-3x+5 3. -sqrt 18 divided by sqrt 12 Thank you!

### Arithmetic

32 is 40% of what number? I am brushing up on math that I haven't done in years. Could someone please explain this step-by-step to remind me how to do this kind of problem properly? Thank you!

### Math

please help with this question .Name two planes that intersect in UV in the figure to the right. I have a diagram to post as well is their a way to post it here ?

### math-help solve please

find out how long it takes a $2700 investment to double if it is invested by 7% compounded semiannually. Round to the nearest tenth of a year . Use the formula A=P[1+r/n]^nt

### MATH (to Reiny)

I tried to simplify it with the second fraction by multiplying the top and bottom by "r" and i didn't work. Well at least I don't understand how to get there. Can you please just explain how... n!r/(n-r-1)!(r-1)!r goes to n!r/(n-r+1)!r! I get one put of it, that r x (r-1)! = r...

### Math

I asked this question yesterday, but I am still having alot of trouble, can someone please help me. Thanks. If 1-cos^2x=0.8725, and x is acute, determine the value of x correct to the nearest tenth of a degree.

### Math

Bob wants to start a lawn in an area that is 110ft by 70ft. One bag of seed covers 1200 square feet. How many bags should he buy? Please help me solve

### Math

Write an equation in standard form for the line whose slope is undefined that passes through (5,-3) Please help me solve, my answer is 5x-3y=0... It was marked wrong and i can not seem to figure it out.

### math

Twelve randomly-chosen students were asked how many times they had missed class during a certain semester, with this result: 2, 1, 5, 1, 1, 3, 4, 3, 1, 1, 5, 18. For this sample, the median is _____. A. 2.5 B. 3 C. 3.5 D. 2 need help please

### math

Can someone help me plwease with this problem????? I need to find an equation for the given pair of points and express my answer in x=a,y=b, or y=mx+b form. Please explain it simply as I am really struggling with this. (-1,-1) and (6,6). Thank you so much for your help!!!!!

### math

How can you make 34 by only using the digits 1, 2, 3, and 4? You can put two numbers together (ie 12 or 34). You can use the operations: addition, subtraction, multiplication, (NO DIVISION!!), exponents, and parentheses any way you want!! Please help!!!!

### Math

Is it possible to bend a 20cm length of wire into the shape of a rectangle which has an area f 30cm^2? I have no idea how to even approach this. Please give me some guidance?

### math

A computer company gives a discount of 10% on a new piece of software. If it makes a profit of 4%, what percent does the marked proce exceed the cost price....please show work

### math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

### math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern