1,063 Answered Questions for the topic Pre-Calculus

Pre Calculus

09/07/17

How many phones must you sell to make $2000 in on month
you work at a cell phone company and they base of $1200 per month and $35 for every phone you sell.
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Pre Calculus

09/06/17

The slope of a horizontal line is ____. The equation of the horizontal line passing through (8, 7) is ___.
Not quite sure how to figure these out.  Any tips or advice? Thank you in advance!   Find an equation of the line that satisfies the given conditions:A.) Through (6, 2); slope 2   B.)... more
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Pre Calculus

09/05/17

Look for speed
I set it up as (2(x+2))2+(2x)2=202 but I'm having trouble solving for speed   Two fishing boats depart a harbor at the same time, one traveling east, the other south. The eastbound boat travels... more
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Pre Calculus

09/01/17

The area of a rectangular wall of a barn is 48 square feet. Its length is 44 feet longer than twice its width.
The area of a rectangular wall of a barn is 48 square feet. Its length is 44 feet longer than twice its width.Find the length and width of the wall of the barn.
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Pre Calculus

08/27/17

Express the statement in terms of an inequality involving an absolute value. (Give your answer in terms of hours.)
The arrival time t of train B must be at least 15 minutes different from the 3:00 P.M. arrival time of train A.
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07/24/17

For what value of x is the function f(x) =6x/Sin x undefined in the interval [π/2, 3π/2] ?
I haven't done math in a while so I've forgotten how to solve certain types of problems. 
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07/19/17

Given the polynomial p(x) = 2x^4+x^3+10x^2-31x-18
Given the polynomial p   p(x)= 2x4 + x3 + 10x2 - 31x -18    a. using the rational root theorem list all possible rational roots of P. b. completely factor the polynomial over the set of... more
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07/18/17

A function f with real coefficients has the following characteristics
A function f with real coefficients has the following characteristics   degree f= 4 f has a y-intercept of 52  x-2 is a factor of f -4/3 and 2-3i are both zeros of f    Find f(x) and write... more
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Pre Calculus

05/20/17

A piece of rope is cut into two pieces. One piece is used to form a circle and the other is used to form a square.
A piece of rope is cut into two pieces. One piece is used to form a circle and the other is used to form a square. Use a length of rope of 20 feet to write a function f representing the area of the... more
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Pre Calculus Trigonometry Algebra

04/28/17

Need help solving this math problem with trigonometric functions
Find the values of the remaining trigonometric functions if If tan t = 􀀀4 and csc t > 0.   How would you go about solving this problem?
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04/28/17

Need help solving this math problem with trigonometric functions :)
Suppose the terminal point determine by t lies in the second quadrant and is (-24/25, y).   (a) Find y.   (b) Find the value of the 6 trigonometric functions at 837π + t   I believe the... more
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Pre Calculus

04/21/17

Continuous Compound Interest Question (pre-calculus)
(a) Suppose you deposit P dollars into a bank that pays an interest rate r compounded continuously. How long does it take to double your original deposit P.   (b) Suppose you deposit P dollars... more
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Pre Calculus

04/17/17

Rational Functions II
Graph y=2/x+6-1
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Pre Calculus

03/27/17

Determine the exact values of sin x/2 cos x/2 tan x/2 using the half angle formulas if tan x= 4/3, pi < x < 3pi/2
Determine the exact values of sin x/2 cos x/2 tan x/2 using the half angle formulas if tan x= 4/3, pi < x < 3pi/2
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Pre Calculus Calculus Trigonometry

03/21/17

Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x.
f(x) = x-7/x+3 and g(x) = -3x-7/x-1
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Pre Calculus

03/06/17

writen an equation for the ellipse with each set of characteristics if the foci is (-6,9), (-6,-3) and the length of the major axis is 20
I need help solving this equation, it is preferred if there is a detailed explanation about how to find the center and the vertices. 
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Pre Calculus

03/05/17

Verify the identity. cot{x- pi/2}=-tan x
I'm just not sure how to go about doing this.  Thank you for your help.
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Pre Calculus

02/25/17

Find the polynomial function of degree 3 whose graph is shown in the figure.
The graph intercept point is at (1,-3)
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Pre Calculus

02/25/17

Find the zeros of f(x), and state the multiplicity of each zero
f(x)=(x2+x-12)3(x2-9)2
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02/14/17

PRECALCULUS HELP: inverse of a equation
The functionf(x) = −12 x^2 + 6x + 5is not invertible, however the domain can be restricted so that the function is invertible only on the restricted domain. There are many ways to do this. One way... more
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Pre Calculus

01/25/17

a fund earns 10.4% annual interest. what should your monthly payment be if you want to accumulate $370000 in 12 years
 a fund earns 10.4% annual interest. what should your monthly payment be if you want to accumulate $370000 in 12 years
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Pre Calculus

01/18/17

Word problem troubles.
When a tortoise travels across a highway, his speed is 3ft/hr faster than normal due to the incentive of making it across safely. If he can cross a 36 foot wide road in one hour less than the time... more
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Pre Calculus

01/18/17

Alice thought of a number, added 9, divide by 3, subtract 2, multiply by 4 to give and answer of 8, what is the starting number?
 Alice thought of a number, added 9, divide by 3, subtract 2, multiply by 4 to give and answer of 8, what is the starting number?
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Pre Calculus

01/15/17

use the distance formula to determine the coordinate of P.
Point P lies on the y-axis. The coordinate of A and B are (-21,0) and (15,0) respectively. If the sum of the distance PA and PB is 54, use the distance formula to determine the coordinate of P.
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Pre Calculus

01/08/17

Use the Rational Zeros Theorem to write a list of all possible rational zeros of the function. f(x) = 2x3 + 8x2 + 7x - 8
This is what I wrote but I'm not sure where I went wrong:   When trying to find the Rational Zero Theorem of a function you must write in descending order and must be in the form of p/q. P is a... more
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