485 Answered Questions for the topic Precalculus Homework

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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03/07/15

Solve using logarithmic
given: populations of 2 towns Springfield: f(t)=200(2)^t/3shelbyville:g(t)=500(1/4)^t/5when will springfeikd and shelbyville have the same populatio? What is that population? With explaintion and... more
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Precalculus Homework Precalculus

02/23/15

Sketch two complete cycles of the graph, then answer the question about the function. How is the graph related to its parent graph y=sinx or y=cosx
1) y=5 sin2x 2)y=3 cos(x/2) 3)y=2 sin(2Πx)+1  
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Precalculus Homework Precalculus

02/23/15

Sketch the graph of each function, showing two complete cycles between [-2pi,2pi]. label the x-coordinates of any zeros or asymptotes
1) y=cosx 2)y=tanx 3)y=sinx 4)y=cscx
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Precalculus Homework Help With Word Problem

02/10/15

Word problem need help please
A baseball team plays in a stadium that holds 55,000 spectators. With the ticket price at $10, the average attendance at recent games has been 27,000. A market survey indicates that for every... more
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Precalculus Homework

02/10/15

Find the area of the triangle PQR where P, Q, and R are points on the unit circle located at angles p/3, p, and 7 p/4 respectively.
Find the area of the triangle PQR where P, Q, and R are points on the unit circle located at angles π/3, π, and 7 π/4 respectively.
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Precalculus Homework

02/10/15

find all solutions on the interval (0,2p) by first multiplying to rid the denominator, and then squaring both sides. (sinx)/(1+cosx) =1
find all solutions on the interval (0,2π) by first multiplying to rid the denominator, and then squaring both sides.
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Precalculus Homework

02/10/15

Find the exact decimal of the coefficient x^6 y^6 in the expansion of (0.5x+0.5y^2)^9?
Find the exact decimal of the coefficient x^6 y^6 in the expansion of (0.5x+0.5y^2)^9?
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Precalculus Homework Precalculus Word Problem

02/05/15

Find the distance
A surveyor on one side of a river wants to find the distance between points A and B on the opposite side of the river. On her side, she chooses C and D, which are 20m apart, and measures angles;... more
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Precalculus Homework Precalculus Precalculus Honors

02/04/15

find the angle between vectors u and v. u= <-1,0> v= <0,2>.
Why is it that θ will be 90 and not 270
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Precalculus Homework

01/27/15

If x is the width of the page, find a function in the variable x, giving the area of the printed page.
A book has 1 inch margins at the top and bottom and .5  margins on the sides and an area of 50 inches squared.
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