2,195 Answered Questions for the topic Pre Calculus

05/16/16

Pre Calculus
For the rational function f(x)=(x2-1)/(x3+9x2+14x), find the domain. a) (-∞, -7)∪(-7, -2)∪(-2, ∞) b) (-∞, -7)∪(-7, -2)∪(-2, 0)∪(0, ∞) c) (-∞, 0)∪(0, ∞) d) (-∞, 0)∪(0, 2)∪(2, 7)∪(7, ∞)  
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05/16/16

Pre Calculus
Given the center, a vertex, and one focus, find an equation for the hyperbola: center: (4, −2); vertex (4, 2); one focus (4, -2+4√5)
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05/16/16

Pre Calculus
Find an equation for the parabola described by its vertex, directrix, and focus point: vertex (√2,-√3); directrix x=2√2; focus (0,-√3)
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05/16/16

Pre Calculus
Given the equation of an ellipse, identify the center point: 4x2 + 40x + 25y2 - 100y + 100 = 0
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05/16/16

Pre Calculus
Given the vectors, a = 3i + 4j, b = -2i + 5j, c = 10i -j, find a + (b - c) = ?
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05/16/16

Pre Calculus
Find the dot product between the vectors u and v: u = 6i - j and v = 4i + 2j
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05/16/16

Pre Calculus
A force of 50 pounds is directed 30 from the horizontal, find the vector that represents this force
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Pre Calculus Math Precalculus Math Help

05/15/16

Pre Calculus
If vector v has an initial point at P1 and a terminal point at P2, write v as multiples of the basis vectors i=〈1,0〉and j=〈0,1〉That is, write v in the form v = ai + bj.P1 = (5, 2), P2 = (7, 11) and... more
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Pre Calculus Math Precalculus Math Help

05/15/16

Pre Calculus
Find the dot product between the vectors u and v: u = 6i – j and v = 4i +2j . a)11 b)22 c)-11 d)-22
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Pre Calculus Math Precalculus Math Help

05/15/16

Pre Calculus
If a force of 30 pounds is directed 30° from the vertical, what vector represents this force? a)-15i+15√3 j   b)15i+15√3 j   c)-15i-15√3 j   d)15i-15√3 j
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Pre Calculus Math Precalculus Math Help

05/15/16

Pre Calculus
Find the projection of vector u onto vector v; projvu=(u(times)v)/llvll2)vu = 4i –5j and v = 2i + j . a)-6/5i-3/5j b)-26/5i-13/5j c)26/5i+13/5j d)6/5i+3/5j  
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Pre Calculus Math Pre Calculus Math Help

05/15/16

Pre Calculus
Let v= -3√2 i- 4√2 j. Find a unit vector that points in the opposite direction as v.a)5/3i + 5/4j b)-3/5i - 4/5j c) -5/3i - 5/4j d) 3/5i + 4/5j  
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Pre Calculus Derivatives

05/15/16

Derivative
If f(x)=8x^3-2x-6, approximate the derivative at x=2 using a forward difference approximation of (f(x+0.01)-f(x))/0.01   f'(2)=?????    Would you please explain how to solve this problem? 
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Pre Calculus

05/12/16

A tee on a gold course is 335 yards to the hole. The golfer hit from the tee 275 yards and 19 degrees to the left. How far is the ball from the hole?
 A tee on a gold course is 335 yards to the hole. The golfer hit from the tee 275 yards and 19 degrees to the left. How far is the ball from the hole?
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Pre Calculus Math Calculus Math Help

05/09/16

Pre Calculus
1) Find the quotient of the complex numbers 2(times)(square root of) 3 (cos (116 (degrees))+ i sin (116(degrees))) / 2 (cos(82(degrees)) + i sin (82 (degrees))) 2) RE write the complex in polar... more
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Pre Calculus

05/03/16

Find the equation of the ellipse with a vertex of (0,6) and a co vertex of (5,0)
Also find the equation of the ellipse for a vertex of (-4,0) and a co vertex of (0,3)
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Pre Calculus

05/01/16

Pre-Calculus
Solve the equation on the interval [0,2pi).   √2 cos x - 1 = 0   x= pi/? , ?pi/?
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Pre Calculus

05/01/16

Pre-Calculus
Solve the equation on the interval [0,2pi).   7 sec x - 7 = 0   x = ?
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Pre Calculus

04/30/16

find sin2x, cos2x, tan2x when tan(x)= -1/2
sin2x =   cos2x =   tan2x =
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Pre Calculus Math

04/21/16

studying for my pre calculus test tomorrow and don't know how to solve these questions as I missed this unit
a)2cosθ +1 = 0 , 0°≤θ<360°   b)3tanθ -√3 = 0 , 0≤θ<2Pi
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Pre Calculus Math

04/21/16

Need help with pre-calculus, have test tomorrow so I need to know how to do this asap! Thanks!
Determine the approximate measure of all angles that satisfy the following..   a)   tanθ=0.65 , -180°≤θ<360°    
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Pre Calculus Math Math Help

04/19/16

Need help understanding this stuff for my pre cal test tomorrow answer ASAP please! thanks!
Determine the appropriate measure of all angles that satisfy the following (Round to nearest decimal place)   a) cosθ = 0.25 , 0≤θ<360   b) sinθ = -0.85 , 0≤θ<2Pi   Thanks so much!!!!!
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Pre Calculus Math Math Help

04/19/16

Need help with pre calculus please
Identify the measure for faida in the domain 0 DEGREES less than or equal to FAIDA less than or equal to 360 DEGREES such that P(FAIDA) in the given point.   a) P(FAIDA) =( -1/2, root3/2)   b)... more
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Pre Calculus

04/13/16

find a number c such that area ((1/x),1,c) =2
practicing for final in an entry level calc class and found a question like this, not sure how to approch it
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Pre Calculus

04/13/16

How would I solve this? I have tried everything.
A spinning, unbalanced wheel is installed in an exhibit, and its angular velocity (in Hertz) is approximated by the equationω(t) = 8 cos(14πt + 7)+ 10. Determine the approximation for the maximum... more
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