Friday

October 31, 2014

October 31, 2014

Number of results: 25,215

**real-life step function**

So if I wanted to do a step-function graph for gas prices, how would that work? I'm a little confused. Could someone give me examples please? That would be so helpful (: Thanks!
*October 16, 2012 by Claire*

**college algebra**

find a real-life application of a quadratic function. State the application, give the equation of the quadratic function, and state what the x and y in the application represent. Choose at least two values of x to input into your function and find the corresponding y for each...
*October 19, 2008 by Renee*

**math**

I am supposed to come up with a real life problem and then write a function to represent that real life scenario, but I am not confident in my answer. Could you look it over and tell me if I did it correctly? The basic cell phone plan costs 19.99 a month plus an additional fee...
*November 26, 2009 by Lisa...please help*

**Math**

I need help with scales and converting them to real-life measurements. So, there's this line on the page that measures 1 metre in real life. I measured it with my ruler and it is 9.3 cm. So the scale is 9.3 cm = 1 m. But how would I convert measurements with my ruler into real...
*March 27, 2008 by Lucy*

**Math**

What is the differnce between a range and domain how can I tell if it is a function or non function. I need a real life example Please help!
*January 18, 2012 by Brian*

**Algebra**

What is the difference between domain and range? Describe a real life situation that could be modeled by a function? I think I understand domain and range. Domain is the x axis and range is the y axis correct? I need help with applying it to real life. Thank you.
*April 2, 2008 by Tara*

**College Algebra**

Find a record breaking temp. for a city. Include name of city, temp., and record broke. Give the formula for converting degrees F. to degrees C. Using the formula show how to convert to degrees C. Part 2) Find real life application of a linear function. State the application, ...
*June 15, 2008 by Leigh*

**math**

I'm having trouble understanding one step in a proof of the Cauchy-Schwarz inequality: u = a non-zero vector v = another vector a = <u,u> (so a > 0 by positivity axiom) b = 2<u,v> c = <v,v> (so c >= 0 by positivity axiom) t = any real number 0 <= <...
*January 4, 2007 by mathstudent*

**college algebra**

find a real-life quadratic function
*November 20, 2009 by Lisa*

**algebra**

What is an example of a real life situation that could be modeled by a function.
*February 28, 2011 by bianca*

**Algebra**

Can you please give me some real life examples of using variables and solving equations. These are 6th grade students and I need to show real-life experiences. Thanks!
*February 18, 2013 by Renee*

**College Algebra**

Using the 7 steps outlined in section 4.3 of your book, analyze the graph of the following function: R(x) = x^2 - 49/x^4 - 16 Step 1: Factor the numerator and denominator of R and find its domain. If 0 is in the domain, find y-intercept, R(0), and plot it. Step 2: Write R in ...
*August 7, 2012 by Kameesha*

**computer science**

Can you find the reason that the following pseudocode function does not return the value indicated in the comments? // The calcDiscountPrice function accepts an item’s price and // the discount percentage as arguments. It use those // values to calculate and return the ...
*November 21, 2012 by Terry*

**math**

Describe a real life situation that could be modeled by a function. A real life situation is: A family decides that they want to get the carpet done in their house. They already have all the necessary material to do the work but they do not know how. They need to hire someone ...
*October 10, 2010 by Anonymous*

**principals of math**

a triangle drawn on a map has sides of lenghts 7.0 cm, 11 cm, and 15 cm. the shortest of the corresponding real-life distances is 123km. find the longest of the real-life distatnces. round to the nearest unit.
*April 14, 2013 by Christine*

**Chemistry**

Uranium-238 has half life of 4.51 * 10^9 years Uranium-234 has half life of 2.48 * 10^5 years Thorium-230 has half life of 8.0 * 10^4 years Radium-226 has half life of 1.62 * 10^3 years Lead-210 has half life of 20.4 years. The rate constant for the decay of unstable nuclide X...
*March 20, 2012 by Harry*

**Algebra**

I just need an example of a real-life application of a quadratic function. Thanks so much!
*June 23, 2008 by Julie*

**Math**

Explain in 2-3 complete sentences how using function tables can be useful in real life.
*March 19, 2013 by ISABELLA*

**math**

What is the difference between domain and range? Describe a real-life situation that could be modeled by a function
*June 5, 2008 by Anonymous*

**math**

What is the difference between domain and range? Describe a real life situation that could be modeled by a function.
*October 23, 2008 by johnny*

**math**

What is the difference between a domain and a range? Describe a real life situation that could be modeled by a function.
*January 26, 2009 by tera*

**algebra**

What is the difference between domain and range? Describe a real-life situation that could be modeled by a function
*January 12, 2010 by Melissa*

**Algebra**

What is the difference between domain and range? Describe a real-life situation that could be modeled by a function
*January 12, 2010 by Melissa*

**math**

What is the difference between domain and range? Describe a real-life situation that could be modeled by a function
*January 12, 2010 by Melissa*

**Algebra**

What is the difference between domain and range? Describe a real-life situation that could be modeled by a function
*January 12, 2010 by Michelle*

**Calculus**

Use the four-step process to find the slope of the tangent line to the graph of the given function at any point. f(x) = 16 - 10 x Step 2: f(x + h) - f(x) = Step 4: f'(x) = lim(h->0)(f(x + h)- f(x))/h =
*June 7, 2013 by Shan*

**College Algebra ~ Please Help**

Can someone give me some real life applications that I can use for a quadratic function.
*November 20, 2007 by Alicia*

**math**

What is the difference between a domain and a range? Describe a real life situation thatcould be modeled by a function.
*January 25, 2009 by tera*

**Math**

please go step by step to better understand if 2f(x)+f(1-x)=x^2 for all real numbers, the f(x)=?
*October 26, 2010 by jon*

**algebra**

find the real number solutions of the equation. w^4+w^3-w=1 could you please show step by step..thank you
*February 24, 2008 by jimmy*

**math**

please go step by step to better understand if x,y,z are three different real numbers with y/x-z=x+y/z=x/y, evaluate x/y
*October 26, 2010 by jon*

**algebra**

What point in the feasible region maximizes the objective function? Step by step please x¡Ý0 y¡Ý0 Constraints -x+3¡Ýy y¡Ü1/3x+1 objective function C=5x-4y
*December 10, 2013 by bowershe*

**factoring**

can this equation be factored further? y= x^4+2x^3+4x^2+8x+16 Not in the real number system. If you plot the function, you will see the minimum is at x=-1.1 (approx) and y is positive. At no x does the function equal zero, so there are no real roots, which means, no factors. ...
*July 26, 2006 by kristie*

**English**

I need a real life example on how growing up or maturing involves seeing and experiencing pain. We used examples from this book we were reading but I also need a real life example and I can't think of one
*June 4, 2012 by Jacob*

**math 116**

What is the difference between domain and range? The domain of a function is the set of all values for the independent variable (in the following example, that's the x) for which the function is defined. That is, if you have a function such as f(x) = 1/x Then this function is ...
*January 7, 2010 by sue*

**algebra**

come up with 2 real world examples of situations that use function rules. think about daily life, your home, or the community you live in for ideas.
*November 6, 2012 by mikaela*

**algebra 2**

In the function f(x)=(x+5)^4 +k , for which values of k does the function have two real solutions? no real solutions? Explain?
*November 24, 2008 by Kiki*

**math**

In the function f(x)=(x+5)^4 +k , for which values of k does the function have two real solutions? no real solutions? Explain?
*November 24, 2008 by Kiki*

**Tech Ed**

How can simulations be used in education? A.They allow people to touch a real item through the computer B.They provide a realistic experience that students may not get in real life C.They substitute games for learning D.They make games real My answer B?
*January 16, 2014 by Eugene*

**Sequence and series**

Do you know the difference between a sequence and a series? Graph the terms of an arithmetic series. Remember the domain is the set of natural numbers, not the set of real numbers. What type function do you see? Graph the terms of a geometric series. Remember the domain is the...
*April 21, 2007 by Tony*

**ALGEBRA HELP**

When solving the equation, what property was used to go from step 3 to step 4? Step 1: -(2x+3= x-18 Step 2: -2x-3=x-18 Step 3: -3=3x-18 Step 4: 15=3x A)APOE B)SPOE C)MPOE D)DPOE
*October 21, 2013 by cv*

**maths(urgent)thanks.**

a parabola with turning point at (1,-2) and passing through the origin.find the equation of this parabola. how do i do this? can someone please show me how to solve it step by step?thanks! You know that at x = 0 the function is zero. Because the turning point is at x = 1 must ...
*May 30, 2007 by Emma*

**College Algebra**

3x-1/x^2-10x+26 Find all (real) zeros of the function Find all (real) poles of the function The function has... A horizontal asymptote at 0? A non-zero horizontal asymptote? A slant asymptote? None of the above
*November 5, 2012 by Kenzie*

**Family Life**

how to create a step-by-step action plan.
*November 8, 2009 by TOM*

**Statistics**

An insurance sales representative selects 4 policies to review. The group of policies she can select from contains 10 life policies, 5 automobile policies, and 3 homeowners policies. Find the probability of selecting all life policies. The number of ways to select all life ...
*May 3, 2012 by Ambra*

**Pre-Calculus**

A rectangle is bounded by the x-axis and the semicircle y = √36 – x2, as shown in the figure below. Write the area A of the rectangle as a function of x, and determine the domain of the area function. A = all real numbers except x = 36 all real numbers except x = 6 0 <...
*October 2, 2011 by Amanda*

**Algebra**

22. State the domain of the function y=3x+2 a. D: Real numbers b. D: x not equal to 0 c. D: x < 0 A? 23. State the range of the function y=2x^2 a. R: y greater than or equal to 0 b. R: x not equal to 0 c. R: y < 0 I'm not sure? 24. Is y=sqrt2x a function? a. Sometimes b...
*April 30, 2010 by y912f*

**math**

usethe rational zero theorem to find all real zeros of the polynomisl function.Use the zeros to factor f over the real numbers. f(x)=x^4+2x^33-7x^2-8x+12 what are the real zeros?> use the real zeros to factor f f(x)=
*January 10, 2013 by anonymous*

**Algebra 1 ( Inequalities and their Graphs)**

Come up with 2 real world examples of situations that use function rules. Think about your daily life, your home, or the community you live in for ideas. . Can i get an example because i dont know how to do this..
*November 14, 2013 by Gabby*

**Math**

can you show me step by step how tot find the domain of a function like this h(x)=7x-2
*July 16, 2012 by chchch*

**Alegbra**

I've learned that the difference between domain and range is.....domain is the set of possible X values and range is the set of possible Y values. also, a domain is the values that a function maps "from" and the range is the values that a function maps "to" I am having ...
*March 18, 2008 by greatdanelola*

**math **

show me step by step how to find the domain of this function then graph it g(x)=2x-4
*July 16, 2012 by chchch*

**Algebra**

Find the zeros the function *could someone explain this to me step by step I'm very confused Y=x^2-x-42
*November 27, 2007 by Brittany*

**Math**

Express this function in vertex form by completing the square: 3x^2 - 4x + 1 PLEASE SHOW STEP BY STEP!!!
*September 17, 2007 by Need Help*

**algebra2**

Find the values of x and y that maximize the objective function P=3x + 2y for the graph. What is the maximum value. step by step please
*December 10, 2013 by bowershe*

**math**

Let the Function a @ b be defined as 3a + 2b for all real numbers a and b. If u and v are real #'s for which u and v = v @ u = 20. What is the value of 2u @ 3V?
*January 27, 2010 by Carmianerlo*

**Pre-calculus**

can someone show how to graph step by step the polynomial function -x^4 - 4x^2. That is -x to the fourth power minus -4x squared. Please Help!!!
*September 15, 2011 by Misty*

**Calculus**

I need step-by-step help for solving the lim x -> 0 for the function sin(x)/(x + tan(x)) I can do simpler ones, but this one throws me off. Thanks.
*October 14, 2013 by Joshua*

**CALCULUS HELP**

Find the derivative of the following function showing your work and fully simplifying your answer. STEP BY STEP PLEASE!!! f(x)=(8x-3)^5/(6x+7)^12 THANK YOU SO MUCH!!!
*March 12, 2014 by KESHA*

**Algebra help**

f(x)=x^3-4x^2-x+4 How do I find the x-intercept for this? This is from my book: step 1: 0=x^3-4x^2-x+4 step 2: 0=x^2(x-4)+(-1)(x-4) step 3: 0=(x^2-1)(x-4) I know how to solve once I get to step 3, but in step 2, I don't know what they've done or why. Where does that (-1) come ...
*June 16, 2009 by Claure*

**Quick math help**

In which step below does a mistake first appear in simplifying the expression? 0.5(-12c+6)-3(c+4)+10(c-5) Step 1: -6c+3-3(c+4)+10(c-5) Step 2: -6c+3-3c-12+10(c-5) Step 3: -6c+3-3c-12+10c-50 Step 4: 7c-41 Please help me!!! Thank you!!
*December 11, 2013 by Anonymous*

**math**

Thank you for your help :) "The piecewise function f(x)= n(x^3)-x______when____x<(or=to)1 =m(x^2)+5_______when_____x>(or=to)1 is differentiable everywhere. What is n? If you could explain step by step how to do this that would be great because I just do not see how to do...
*January 17, 2011 by APPRECIATIVE STUDENT*

**CALCULUS**

Find a formula for the inverse of the function. y=x^2-x, x>=(greater than or equal to) 1/2 Please give me a step by step explanation. I think my algebra is wrong... Ty
*February 1, 2014 by MATH*

**algebra**

Find the domain and range of the relation and determine whether it is a function? Answers are Domain x>1 range y>0yes it is a function Domain all real numbers,range all real numbers yes it is a function Domain positive integers, range positive integers no it is not a ...
*March 12, 2014 by snow*

**algebra**

Find a bound on the real zeros of the polynomial function f(x)=x^4+x^3-4x-6 Every real zero of f lies between ______ and______.
*June 8, 2013 by Sharday*

**college algebra**

form a polynomial f (x) with real coefficients having the given degree and zeros. degree 5; zeros 5; -i; -6+-i f(x)= a(?) Please show step by step work.
*November 18, 2012 by ladybug*

**science**

Does anybody know any real life example of a nucleus Are you speaking of nucleus as in the nucleus of an atom or the nucleus of a living organism? If the former, the nuclear atom bomb or H bomb or the decay of radioactive materials to bombard some cancer patients to kill the ...
*April 15, 2007 by Amy L.*

**chem**

ok my professor lost me when explaining this material so please bare with me and help me step by step one of the questions is: after absorbing 1850J of energy as heat, the temperature of a .500-kg block of copper is 37C what was its initial temperature (the specific heat ...
*October 12, 2011 by cheryl*

**calculus**

Find a rational function f : R → R with range f(R) = [-1, 1]. (Thus f(x) = P(x) /Q(x) for all x belongs R for suitable polynomials P and Q where Q has no real root). R(real numbers)
*November 17, 2012 by yin*

**geometry**

Create a word problem about a real life situation involving perimeter and area of a composite shape. I don't know any real life situations involving perimeter and area of a composite shape. Need Help. Please Help.
*December 19, 2012 by emily*

**Calculus**

A real estate office manages 50 apartments in a downtown building. When the rent is $900 per month, all the units are occupied. For every $25 increase in rent, one unit becomes vacant. On average, all units require $75 in maintenance and repairs each month. How much rent ...
*April 24, 2014 by Deepa*

**Tech Ed**

How are virtual field trips helpful in education? A.They let students visit locations through video and images that they might never be able to visit in real life. B.They let students pick up objects in real life C.They let students post their field trip experiences online D....
*January 16, 2014 by Eugene*

**college algebra**

1. solve the following logarithmic equation log_8(x+8)+log_8(x+7)=2 what is the exact solution 2.se the rational theorem to find all the real zeros of the polynomial function. use the zeros to factor f over the real numbers. f(x)=4x^4+5x^3+9x^2+10x+2 a.find the real zeros of f...
*December 1, 2012 by Ladybug-two questions- Reiny please help*

**Math**

in 1992, the life expectancy of males in a certain country was 69.8 years. in 1999, it was 72.4 years. Let E represent the life expectency in year t and let t represent the number of years since 1992. The linear function E(t) that fits the data is E(t) =_ t+_ Use the function ...
*January 11, 2011 by michelle*

**College algebra**

Use the rational zeros theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers f(x)=9x^4+28x^3+66x^2+196x+21 Find the real zeros of f Use the real zeros to factor f f(x)=
*May 14, 2013 by Alex*

**LA**

I read this story called Secret life of Walter Mitty online. Question 1. Does walter undergo any changes as the story processes? is this the answer please check His "secret life" takes him to a world of amazing and fantastic adventures beyond the world of imagination where he ...
*September 12, 2011 by HELP! please*

**algebra**

Im lost i dont know how to do this can someone show me step by step how to solve this For what value does c does the equation have one real root? Hint using the values of a and b found in the equation, solve D = 0 for c. Consider the quadratic expression X^2 + 4x + c = 0.
*October 8, 2013 by toni*

**algebra**

Im lost i dont know how to do this can someone show me step by step how to solve this For what value of c does the equation have one real root? Hint using the values of a and b found in the equation, solve D = 0 for c. Consider the quadratic expression X^2 + 4x + c = 0.
*October 8, 2013 by toni*

**college algebra**

use rational zeros theorem to find all the real zeros in the polynomial function. use zeros to factor f over real numbers. f(x)=x^3+10x^2-13x-22 find real zeros of f? use real zeros to factor f?
*August 24, 2012 by Bella*

**MATH SINUSOIDAL APPLICATION**

Would pulling a roll of thread create a sinusoidal function? please suggest some real life application of sinusoidal wave that i can experiment with...
*October 4, 2013 by Anonymous*

**Chemistry**

The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec. (a)Starting with [IBr] = 1.50M, what will [IBr] become after 2.50 minutes? (b)How long, in minutes, will it take for [IBr] to go from 0.500M to 0.100M? (c)What is the half-life for ...
*January 24, 2011 by David*

**math**

In 1993, the life expectancy of males in a certain country was 61.3 years. In 1999, it was 64.7 years. Let E represent the life expectancy in year t and let t represent the number of years since 1993. The linear function E(t) that fits the data is? answer: E(t)=-0.03t+61.3 use...
*January 7, 2009 by deedra*

**Calculus, check my answers, please! 3**

Did I get these practice questions right? 1. Suppose that f is an even function whose domain is the set of all real numbers. Then which of the following can we claim to be true? ***The function f has an inverse f –1 that is even. The function f has an inverse f –1, but we can'...
*October 2, 2013 by Samantha*

**math**

Which three options are true about the quadratic equation?? y= 4t^2 + 16t + 18 A. The graph has a minimum. B. The graph of y crosses the horizontal axis at t = 10 and t = 20. C. The equation 4t^2 + 16 + 18 = 6 has one real solution. D. The function has a maximum at t = 10 E. ...
*April 30, 2007 by jojo*

**math**

i need help with the domain and range of a step function. the equation is f(x)= 59.99 + .29m thanks What is the m in the function?
*December 18, 2006 by mat*

**Calculus**

Sketch a graph of a function f(x) that is differentiable and that satisfies the following conditions. c) f'(-3) = 0 and f'(1) = 0 Please show me, step by step, how to sketch the problem!
*May 25, 2008 by Anonymous*

**math**

Could you show me step by step how to find the inverse of this problem: log with base of 2 (x+1) Thanks! It is not clear what the problem is. You are given a function of x. Let's calli it y. Are you trying to come up with an equation for x in terms of y? If log(base2)of (x+1...
*July 21, 2006 by kristie*

**math**

I dont understand this calculus problem at all. can someone show me step by step? Find all values of x for which the function is differentiable
*October 3, 2009 by alison*

**Precalc**

use completing the square to describe the graph of each function. How do you complete the square with this equations. please show me step by step so that I can understand it. x^2-4x+6
*October 27, 2011 by Amy*

**Chemistry**

how mant moles are in 1.30g of (NH4)2SO4? answer in units of mol. today our teacher briefly went over this and doing my homework i totally lost it. and cant remember for the life of me what to do could you please help me and show me step by step what to do. thanks
*March 18, 2009 by Leona*

**precalculus**

Horizontal Translation and dialation Problem : let f, g, and h be defined f(x)= x2 -2< or equal to x < or equal to 2 g(x)=x-3 for all real valuse of x h(x) = 1/2 x for all real values of x a. f(g(x))= f(x-3). What transformatioon is applied to function f by composing it ...
*October 3, 2010 by kayla*

**math **

Horizontal Translation and dialation Problem : let f, g, and h be defined f(x)= x2 -2< or equal to x < or equal to 2 g(x)=x-3 for all real valuse of x h(x) = 1/2 x for all real values of x a. f(g(x))= f(x-3). What transformatioon is applied to function f by composing it ...
*October 3, 2010 by kayla*

**algebra**

In 1995, the life expectancy of males in acertain country was 67.5 years. In 2002, it was 70.8 years. Let E represent the life expectancy in year t and let t represent the number of years since 1995. The linear function E(t) that fits the data is E(t)=?t+?. Use the function to...
*February 21, 2010 by Anonymous*

**MAT116- Algebra 1A**

What is the difference between domain and range? Describe a real-life situation that could be modeled by a function. •Provide feedback about your classmates’ answers. Describe the values for x that may not be appropriate values even when they are defined by your ...
*May 25, 2008 by shelly, k*

**another word problem!**

iN 1993, THE LIFE EXPECTANCY of males was 68.6 years. In 2000, it was 71.1 years. Let E represent the life expectancy in year t and t represent the number of years since 1993. The linear function E(t) that fits this data is: E(t)=_t + _ (round to the nearest tenth) Use the ...
*March 28, 2010 by bob*

**MATH**

cos(x)=2 and sin(x)=5 Thanks for your previous answers mathmate. No. It's not a typo. I was wondering if someone could explain to me when in real life would I need to solve such problems, or similar, besides answering problems from a textbook. When ever I ask this question I ...
*July 15, 2011 by George*

**Calculus**

Determine the limit of the trigonometric function: Limit as x approaches pi/4 of (1-tanx)/(sinx-cosx) I need step by step help using the special trignometric limits theorem.
*September 26, 2012 by Kayla*

**Need help asap**

I need help! Reasoning: Can a function have an infinite number of values in its domain and only a finite number of values in its range? If so, describe a real-world situation that could be modeled by such a function. Writing: What is the difference between a relation and a ...
*January 9, 2014 by Macie*

**Algebra**

In 1994 the life expectancy of males in a certain country was 61.6 years. In 1999, it was 63.8 years. Let E? represent the life expectancy in year t and let t represent the number of years since 1994. 1) The linear function E(t) that fits the data is: E(t)=___t+___ 2) Use the ...
*April 8, 2010 by Mary*

**math**

In 1993, the life expectancy of males in a certain country was 61.3 years. In 1999, it was 64.7 years. Let E represent the life expectancy in year t and let t represent the number of years since 1993. The linear function E(t) that fits the data is? answer: E(t)=-0.03t+61.3 use...
*January 7, 2009 by deedra*

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