495 Answered Questions for the topic Precalculus Homework

Precalculus Homework

09/28/15

Factor: x^3-7x-6= 0
Hello! I am stuck with this question.The only idea I could come up with is to take out the x -> x(x^2-7)-6=0Any help is appreciated!
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Precalculus Homework

09/21/15

Write the function as a composite of two functions f and g. (More than one answer is correct)
f(g(x))= 1/1+x^2      and f(g(x))= √x / 3√x +2
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Precalculus Homework

09/21/15

Show that f(g(x))= x and g(f(x)) =x
f(x)= (5-x) ^1/3 , g(x)= 5-x^3
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Precalculus Homework

09/20/15

Define a function g that gives the area of a circle, A , in terms of the circumference of the circle. Simplify your answer as much as possible.
g(A)=pi(C/2*pi)^2 come up with this. would i input the Area forumla once i isolated r, into the Circumference formula
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Precalculus Homework

09/20/15

Define a function f that determines the radius of the circle in terms of the circumference of the circle.
Recall that the area of a circle, A, (in square inches) is determined by the formula A=πr2 where r is the radius of the circle (in inches). The circumference of a circle, C, is determined by the... more
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Precalculus Homework

09/20/15

Define a function k that determines the length of the fence in feet in terms of the fence's width in feet, w , given the total amount of fence is 1000 feet.
k(w)=500-L came up with this i know that 1000=2l+2w  keeps saying its wrong  
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Precalculus Homework

09/17/15

Look below in description for question.\/
If a cow of mine has a calf at the age of two years, and supposing she goes on having the like every year, and supposing every one of her young to have a female calf at the age of two years, and... more
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Precalculus Homework

09/16/15

You have just built a new home and plan on building an enclosed rectangular space on the back of the house using 52 sections of fence you have purchased.
You have just built a new home and plan on building an enclosed rectangular space on the back of the house using 52 sections of fence you have purchased. Each section of fence is one foot in... more
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Precalculus Homework

08/24/15

Suppose f(x)=16-x^2. Compute the expression f(4)-f(2)/4-2 and explain what the results tell us about f(x).
 We're learning about functions in class and I really have no idea what this question is even asking. Pleaseeeee help
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Precalculus Homework Precalculus Algerbra

08/24/15

Pre-Cal/Algerbra Homework Question
A rectangle is 3 inches longer than it is wide. 2 inch squares are cut out from each corner of the rectangle, and then the edges are raised to form a box. the volume of the box is 480. Find the... more
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Precalculus Homework Word Problem Help

08/23/15

How many consecutive hits must Tai get to increase his batting average to 0.600? (Description has beginning of question)
Tai has been officially at bat 128 times and has hit 32 times. His batting average is 32/128 = 0.250. How many consecutive hits must he get to increase his batting average to 0.600? I'm just... more
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Precalculus Homework Word Problem Help

08/23/15

The sum of the reciprocal of a number and the reciprocal of 5 less than the number is 7 times the reciprocal of the original number. Find the original number.
This is a math problem that has been giving me trouble for over 30 minutes now. I'm not quite sure how to tackle it.
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Precalculus Homework Precalculus Precalc Precalculus Honors

06/03/15

As a ship sails into the harbor, the navigator sights a buoy at an angle of 20 degrees to the path of the ship.
This ship sails 200 meters farther and finds that the buoy now makes an angle to 38 degrees. 1) How far is the ship from the buoy at the second sighting? 2) What is the closest the ship will ever... more
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Precalculus Homework Precalculus Trigonometry Rotations

05/19/15

Please help with coordinate axes rotation!
The exact question was: "Rotate the coordinate axes to eliminate the xy term. 2x2 + 2(sqrt3)xy + 4y2 - 8 = 0"   (sqrt= square root)    
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Precalculus Homework Precalculus Trigonometry Math Help

03/29/15

Simplifying Trig Expression
Simplify csc^2x-1/cot^2x 
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Precalculus Homework Precalculus Honors

03/25/15

If (x - a)(x - 1) + 1 = (x + b)(x + c) is true for all x and if a, b, and c are integers, find the sum of all possible values of a.
very hard problem you are god if you can solve this
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Precalculus Homework

03/25/15

How long will it take for an initial investment of $7500, at a rate of 7.2% compounded continously, to triple? Round to the nearest tenth of a year
I need help on my homework. i dont know how to set up the problem
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03/12/15

cosx/1+sinx + 1+sinx/cosx = 2sec
I'd like to know how to solve this problem  We are learning trigonometric identities
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Precalculus Homework Logs

03/12/15

Half life question
Analysis indicated that a scroll wrapping contained 76% of the original carbon-14. The half life of carbon-14 is 5715 years. Set up & solve equation to find age
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03/10/15

Exponential and logarithmic function
Logistic Growth unrestricted growth because of limited habitat and food sup- plies. Under such conditions the population follows a logistic growth model:p(t)=d/1+ke^-ctwhere c, d, and k are... more
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Precalculus Homework

03/09/15

Composition of Functions
Find f(x+h)-f(x)/h for f(x)=2x^2 + 3x   The answer is 4x + 3 + 2h, but I don't know how to arrive at it. I've been always baffled by this type of problem. 
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Precalculus Homework Pre Calculus Please Answer!! Urgent!

03/09/15

Exponential and logarithmic functions
Carbon Dating The age of an ancient artifact can be determined by the amount of radioactive carbon-14 remaining in it. If D0 is the original amount of carbon-14 and D is the amount remaining, then... more
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Precalculus Homework

03/09/15

Question about inverse function for pre-calculus
Determine whether f(x)= √x+8 has an inverse function. If it does, find the inverse function and state any restrictions on its domain. I already figured it does have an inverse function using the... more
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03/09/15

the neutral exponential function
Radioactive Decay A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t)= 13e^-0.015t where m(t) is measured in kilograms. (a)... more
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Precalculus Homework

03/09/15

how do I solve for vectors if v=6i-5j and w =2i+3j and given v=4i+j and w=3i+4j? how do I solve?
how do I solve for vectors if v=6i-5j and w =2i+3j and given v=4i+j and w=3i+4j? how do I solve?
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