2,195 Answered Questions for the topic Pre Calculus

Pre Calculus

03/28/18

Solve the following exponential and logarithmic equations. ln x + ln(x+2) = 4
Need help!!!
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Pre Calculus

03/28/18

solve the following exponential and logarithmic equations. 2^4x+1= 3^5x-2
Need Help!!!
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Pre Calculus

03/28/18

write the following expression as a single logarithm. ln(x-1/x)+ ln(x/x+1) - ln(x^2 - 1)
need help!!
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Pre Calculus

03/26/18

what would the doubling time be if the initial investment were $1,000? $10,000? what effect does changing the principal have on the doubling time, and why?
Homework Question for my Pre Calculus class.
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Pre Calculus

03/26/18

consider an investment of $100 invested at 5%, compounded continuously. how would it take for the investor to have $200?
it's homework
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Pre Calculus

03/22/18

This question is a math matrix
Find 1/2 ([5   -2    4  0] + [14  6  -18  9])
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Pre Calculus

03/21/18

Determine if y^2=8-x^2 equation defines y as function of x
Answer yes or no
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Pre Calculus

03/20/18

Use the matrix you found in Part A and perform the matrix operation -5 Row 1 + Row 2 ---> Row 2
Part A matrix solution was [1  2/3 |8/3]                                       [ 5   2  |12]
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Pre Calculus

03/20/18

Use the given matrix and perform the matrix operation (1/3) Row 1
[3  2  |8] [5  2  |12]
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Pre Calculus Precalculus Population

03/13/18

The population P (in thousands) of Pittsburgh, PA from 2000 to 2003 can be modeled by P=2430e^ -0.0029t where t represents the yr, with t=0 corresponds to 2000.
Question: According to the model, when will the population be approximately 2.3 million?   Answer: 19 years.   Can someone please explain/list the steps on how to find this answer? 
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03/13/18

The population P (in thousands) of Pittsburgh, PA from 2000 to 2003 can be modeled by P=2430e^ -0.0029t where t represents the yr, with t=0 corresponds to 2000.
Question: What were the populations of PA in 2000 and 2003?   Answer: 2000: 2,430,000, 2003: 2,408,950   Can someone please explain/list to me the steps to finding these answers?
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Pre Calculus Pre Cal

03/10/18

You need 2 pounds of peaches in order to make peach ice cream. You bag of peaches weighs 19 ounces. How many pounds of peaches do you need to purchase?
recall their our 16 ounces in a pound
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Pre Calculus

03/09/18

csc theta=-6/5, tan theta>0
Use the given information to find the exact value of thr trigonometric function cos theta/2
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Pre Calculus

03/09/18

Degree​ 4; ​ zeros: 5 - 5 i ; - 4 multiplicity 2
enter  the polynomial
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Pre Calculus

03/07/18

word problem
Jason and Sheldon are neighbors who work for the same accounting firm. They leave the office at the same time. After t seconds, Jason's distance from the office in meters is given as 4 more than 3... more
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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 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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