1,063 Answered Questions for the topic Pre-Calculus

Pre Calculus

01/05/16

Regarding area sector and arc length
The rear windshield wiper blade on a car has a length of 8  inches. The blade is mounted on a 11  inch arm, 3  inches from the pivot point. If the wiper turns through an angle of 150  degrees, how... more
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Pre Calculus Calculus Calculus 1

12/12/15

Find fyx for the function below.
Find fyx for the function below.   z=f(x,y)=3xy−x^2+5y^3
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11/29/15

Please help me with these identity proofs!!
1) (cscx + cotx) / (tanx + sinx) = cotxcscx   2) (1/secx) -secx = -sinx   3) (1-tan^2x / 1-cot^2x) = -tan^2x
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11/20/15

cotx=-sqrt3, cosx<0, tan(x-pi/6)
cotx=-√3, cosx<0, tanx(x-Π/6) find the exact value
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Pre Calculus Precalculus

11/15/15

Someone please help me, I've been stuck for hour on how to evaluate cot(t)tan(t)-sin(t)cos(t)
The choices are:A) sin^2(t) b) sin(t)tan(t) c) sec(t)csc(t) d) tan(t)+1
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Pre Calculus

11/08/15

Maximum volume based on radius.
The surface area of a cylinder is 200 units squared. Find the radius so that the volume is maximized.
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Pre Calculus

11/02/15

Solve the polynomial equation.
Solve the polynomial equation.In order to obtain the first root use synthetic division to test the possible rational roots.   3x^4+26x^3+91x^2+128x+52=0                (SHOW ALL THE WORK)      
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Pre Calculus

10/28/15

Using Descartes' Rule and the Fundamental Theorem of Algebra to predict complex roots of polynomials
I'm taking a pre-calculus course online, and teaching myself is turning out to be very difficult. Most recently, I have to do a written assignment as follows:         How could you use Descartes'... more
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10/27/15

find a polynomial P(x) with real coefficients having a degree 4, leading coefficient 3, and zeros 4-i and 4i
Find a polynomial P(x) with real coefficients having a degree 4, leading coefficient 3, and zeros 4-i and 4i
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10/26/15

Using Descartes' Rule and the Fundamental Theorem of Algebra to predict complex roots of polynomials
I'm taking a pre-calculus course online, and teaching myself is turning out to be very difficult. Most recently, I have to do a written assignment as follows:         How could you use Descartes'... more
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Pre Calculus

10/18/15

in a circle of radius 7, a circular arc of a sector has a length 4(PI). Find the area of that sector
I need help answering questions for my practice test online
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10/06/15

Find an equation of a rational function f that satisfies the given conditions
vertical asymptotes: x = −9, x = 3 horizontal asymptote: y = 0 x-intercept: −2; f(0) = −2 hole at x = 6
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Pre Calculus

10/04/15

Describe the transformation to f(x) to obtain g(x).
g(x)=f(x-3)+4
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Pre Calculus

10/03/15

Find the common ratio, r, for an infinite series with an initial term of 4 that converges to a sum of (16/3).
 I need help fast!
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Pre Calculus

10/03/15

2400 yards of fencing to enclose a rectangular area. find the dimensions that maximize the enclosed area
pre-calculus questions that looks for I believe the minimum and maximums to identify the length and width
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Pre Calculus

09/28/15

Write the standard form of the equation of the line described.
through: (2,-5), parallel to y=4x+5
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Pre Calculus Math Help

09/23/15

How to Express f(x)=lxl as a piecewise function?
Can you please show me the steps on how to express this into a piecewise function? I don't understand it at all.
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Pre Calculus

09/17/15

The profit for a company in February was 9% lower than it was in January. The total profit for the two months was $125,000. Find the profit for each month
 The profit for a company in February was 9% lower than it was in January. The total profit for the two months was $125,000. Find the profit for each month.    January =? February =?
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09/14/15

find the length of the side of the square, given its 3 inches shorter than the diagonal
The side of a square is 3 inches shorter than the length of the diagonal. Find the length of the side.
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09/14/15

find the lengths of the triangle and the square
the sides of an equilateral triangle are one unit more than the sides of a square. If the sum of their perimeters is equal to 107 inches, then find the lengths of the sides of both the square and... more
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09/09/15

Simplify the expression. 5 -tan(?)/ 5csc(?) - sec (?)
I know you are supposed to us the trig identities, but I have know idea where to even begin.
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Pre Calculus

08/30/15

How much was invested in each rate?
you invested 10,000 in two accounts paying 7% and 9% annual interest,respectively if the total interest earned for the year was 880.How much was invested at each rate?  
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Pre Calculus

08/30/15

when 30% of a number is added to the number, the results is 169.
What is the Number?
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Pre Calculus

08/27/15

inclusive of a 6.2% sales tax, a diamond ring sold for $2867.40.Find the price of the ring before the tax was added.
please show me the work.
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Pre Calculus

08/25/15

a 24ft ladder positioned against a wall forms an angle of 75 degrees with the ground, how high up the wall does the ladder reach
i would really like it if you could help me out, I am very confused on this subject (trig)
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