2,195 Answered Questions for the topic Pre Calculus

Pre Calculus

12/06/15

A rectangle is four times as long as it is wide. If it has an area of 36 square inches, what are the dimensions?
I have no clue how to start or solve this problem.
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Pre Calculus

12/06/15

The difference of two numbers is 7. The difference of their squares is 259. What are the two numbers?
i know that x-y=7 and I know that x^2-y^2=259. I'm just not sure how to fully solve.
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Pre Calculus

12/02/15

a wire length x is bent into the shape of a square. express the perimeter of the square as a function of x
i am very confused on this. please help i have a quiz tomorrow and I will fail :(
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Pre Calculus Asymptotes

12/02/15

4(x+1)/ x(x-1) find asymptote
Find the asymptote Of the follwoing problem and label it 
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Pre Calculus

11/30/15

Radium-221 has a half life of 30 sec. How long will it take for 85% of a sample to decay?
I have tried to figure this question out and still cant get it right.
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Expert Answers •1

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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Pre Calculus

11/29/15

Write the equation in standard form for the ellipse
with foci ( - 18,17) and ( - 4,17) and co-vertices - 11,17+ 51 and - 11,17– 51
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11/24/15

cos(11pi/12) using Sum and difference identities
could someone explain finding cos(11pi/12) using Sum and difference Identities. it must use one of... more
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Pre Calculus

11/23/15

Solve the word problems by writting it down as a system of equations and as a matrix.
1)      To raise money a group of three friends is each trying to sell 100 candles each friend has a package containing the same number of tapers votives and tealights the tapers sell for $6.00... more
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Pre Calculus Trigonometry

11/22/15

Tricky trig
What is the horizontal component of a vector having a magnitude of 80 units and a heading of N40 (degrees) W?
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Expert Answers •1

11/22/15

How to deal with trigonometry in application?
A utility pole is anchored to level ground by two 53 ft wires, one on each side of the pole. The wires make a 65 (degree) angle with the ground below. How far apart along the ground are the wires?
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Pre Calculus

11/19/15

What single transformation of f(x) will result in the graph of g(x)?
f(x)=4x  while g(x)=3(4)(x-2)
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Pre Calculus

10/24/15

Write equation of each line in slope intercept form
passing through (-4,5) and (-2,0)
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Pre Calculus

10/20/15

If f (x) = 3x-5 find f (x) -f (a) / x-a
What is the domain , range and function notation 
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Pre Calculus

10/19/15

Find the function f and g so that f of g =h
H(x)=square root 1-x^2
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Pre Calculus Math Word Problem

10/14/15

The pointer on a voltmeter is 6 centimeters in length. Find the number of degrees through which the pointer rotates when it moves 2.7 centimeters on the scale.
i need help with this problem for my pre calc class
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Pre Calculus

10/14/15

The graph of (-1,5) passes through and is perpendicular to the line whose equation is x = y
 write an equation in slope-intercept form of a linear function whose graph satisfies the given conditions.
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Pre Calculus

10/13/15

Degree 4; zeros: -5+5i; 4 multiplicity 2? Enter the polynomial. f(x)=a(.........)
Degree 4; zeros: -5+5i; 4 multiplicity 2?Enter the polynomial.f(x)=a(.........)
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10/13/15

Give a formula for the extended function
F9x) = 3-√x / 9-x that is continuous at a=9 
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Pre Calculus Math Help

09/29/15

How do I find the second term for this sequence: an=2an-1+3 a1=2
I don't really know how to do this, should I just substitute 2 in for n or would that be wrong. 
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Pre Calculus

09/25/15

If a stone is thrown down at 100 ft/s from a height of 1,150 feet, its height after t seconds is given by s = 1,150 - 100t - 16t2.
(a) Find its average velocity over the period [1, 2]. ft/s(b) Estimate its instantaneous velocity at time t = 2. HINT [See Example 3.] ft/s
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09/18/15

The average prescription prices P (in dollars) from 1997 through 2004
can be approximated by the model P=0.1220t^2 + 1.529t + 18.72, 7 <= t <=14, where t represents the year, with t=7 corresponding to 1997. a) determine algebraically when the average retail... more
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Pre Calculus

09/17/15

for the given functions f and g, find the requested function and state its domain
f(x)=6x-3 ; g(x)=2x-4
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Pre Calculus

09/15/15

A group of friends decide to buy a vacation home for $120,000, sharing the cost equally. If they can find one more person to join them, each person's
group of friends buy vacation home for $120,000. If one more person is added, the amount of money equally shared by the group will decrease by $6,000. How many people are originally in the group??
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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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