2,223 Answered Questions for the topic Pre Calculus

03/02/18

Solve on the interval [0, 2pi) (cosx+1)(2cos^2x-3cosx-2)=0
I'm really confused on how to solve this.
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03/02/18

How to solve cos(x)(cosx+1)=0
I missed this class so I'm really confused on how to solve this.
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03/02/18

Solve on the interval [0,2pi) 1-cos theta = (2 - sqrt 3)/2
I dont quite remember how to solve this, if anyone could help.
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Pre Calculus

03/01/18

A certain car depreciates 15 percent per year. If its initial value is 40000 what will its value be
In 5 years 10 years 20 years 100 years
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Pre Calculus

03/01/18

A rabbit breeder has 100 rabbits and the population of the rabbit grows at a rate of 6 percent per month.
Write a recursive formula of previous months population.
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Pre Calculus Trigonometry

02/28/18

There are no solutions to 2 cos x/3 + √2 = 0 on [0°, 360°)
There are no solutions to 2 cos x/3 + √2 = 0 on [0°, 360°) true or false and how 
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Pre Calculus Trigonometry

02/28/18

Identify the general solution of 6 sin2 x - 2 = 1 (Answers in radians)
Identify the general solution of 6 sin2 x - 2 = 1 (Answers in radians).That is exactly how the question is written and these are the answers to choose from  a. π/6 + 2nπ; 7π/6 + 2nπ;b. π/4 + 2nπ;... more
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02/25/18

Put the following functions into standard form by completing the square. Use proper notation throughout.
f(x)=x2-3x-10
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02/24/18

Put the following functions into standard form by completing the square. Use proper notation throughout.
  f(x)=3x2+x-10   I dont know what goes next after these two steps:  3(x2+1/3x+(1/6)2-1/36)-10  3((x+1/6)2-1/36)-10                                                                         
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02/23/18

Can someone explain to me how you would establish this identity: cos(a-B)•cos(a+B) = cos^2a - sin^2B
Please include each step so I can follow along
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Pre Calculus Calculus Functions

02/18/18

h(x) = (x^2+2)/(x-5) if x cannot equal 5 and x+6 if x = 5 ; h(5)
Evaluate the piecewise function at the given value of theindependent variable.
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02/15/18

College Algebra Help
Write an equation in slope-intercept form for the line described:x-intercept negative −6, y-intercept 1   The equation of the line is y equals=
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Pre Calculus

02/12/18

Find two numbers whose sum is 50 and whose product is 504
help please
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Pre Calculus

02/07/18

write the formula for the exponential function
write the formula for the exponential function whose initial value is 5 and decreases with a continuos rate of 15%. Then sketch the graph of the function.
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Pre Calculus

02/05/18

Graphing Ellipses
Find the vertices of the ellipse centered at the origin with eccentricity e=1/5 and focus at (-4,0) and (4,0).    (Enter each solution as an ordered pair.)
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Pre Calculus

02/05/18

Graphing Ellipses
Find the eccentricity of the ellipse given by the following equation.   4x^2+20y^2=80   (Do not enter a decimal approximatio. Enter any radical terms or factors in simplest form.)
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Pre Calculus

02/05/18

Graphing Ellipses
Find the eccentricity of the ellipse given by the following equation.    (x^2/40) + (y^2/4) = 1   (Do not enter a decimal approximation. Enter any radical terms or factors in simplest form.)
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Pre Calculus

02/05/18

Graphing Ellipses
Find the length of the major and minor axes of the ellipse.    16x^2+18y^2=288    (Do not enter a decimal approximation. Enter any radical terms or factors in simplest form.)
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Pre Calculus

02/04/18

Find the exact value of the trigonometric expression when sin(u)= -12/13 and cos(v)= -3/5 (Both u and v are in quadrant 3). tan(u+v)
 I have tried to solve using the sum formula but I can't get the correct answer. It has to be as a fraction.
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Pre Calculus

01/31/18

find the exact value of the expression with drawing:
3 sin 2pi/3 - 4 cos 5pi/2
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01/30/18

Find the logarithmic equation that fits the following data/table
Below are the corresponding x and y values for the table X1 = 100, X2 = 50, X3 = 25, X4 = 12.5Y1 = 0, Y2 = 13, Y3 = 26, Y4 = 39 I clearly see that this data has the multiply-add property and is... more
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Pre Calculus

01/29/18

The function is used to convert temperature from Celsius (C) to Fahrenheit (F). The function C(K) = K − 273.15 is used to convert temperature from Kelvin (K) to
"The function" is F(C)= 9/5C +32
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Pre Calculus

01/26/18

Find the partial sum Sn of the geometric sequence that satisfies the given conditions. (Round your answer to four decimal places.)
a2=0.3 a5=0.0375 n=4 
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Pre Calculus

01/26/18

Determine whether the infinite geometric series is convergent or divergent. If it is convergent, find its sum. (If the series is divergent, enter DIVERGENT.)
-49/9+7/3-1+3/7-
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01/24/18

Aaron runs at a constant speed of 10 feet per second. If Aaron is 48 feet from his front door when he starts running down a straight road toward school, how far
Aaron runs at a constant speed of 10 feet per second. If Aaron is 48 feet from his front door when he starts running down a straight road toward school, how far is Aaron from his front door when he... more
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