920 Answered Questions for the topic Pre-Calculus

Pre Calculus

04/14/14

#### Sums and Arithmetic Series Quick Questions

Jenny decides to raise money for her local charity by encouraging people to lay quarters on the floor of a classroom in the shape of an equilateral triangle. She puts one quarter in the first row,...
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Pre Calculus

04/01/14

#### Pre-Calc Questions

Give a practical interpretation in words of the function1) k(g(t)), where L=k(H) is the length of a steel bar at temperature H and H=g(t) is temperature at time t2) t(f(H)), where t(v) is the time...
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Pre Calculus

03/23/14

#### Help ? Logs

What is the inverse of y=(1/2)^x
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find the given logarithm w/out using log function on calculator
1)...
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Pre Calculus

03/11/14

#### Help ? Porfavor ? Gracias :)

Re write the exponentian equatiin in equivalent logarithmic form
1) e2 =7.389
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if possible write the expressions using sums and/or difference of logarithmic...
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Pre Calculus

03/06/14

#### I neednhelp with this...

Find the half-lives of the substances
1) einsteinium-253, which decays at a rate of 3.406% per day
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2) You place $800...
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Pre Calculus

03/06/14

#### Logs and natural logs question ...please ? thanks

Let u=log 2 and v=log3. evaluate the following expressions in terms of u and/or v.
1) log...
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Pre Calculus

03/05/14

#### Could someone help me with these please ? I'm a little confused

Express the following in terms of x without logs.
1)ln e^2x
2)e^ln(3x+2)
3)ln(1/e^5x)
4)ln sqrt(e^x)

Pre Calculus

03/03/14

#### Evaluate without using a calculator

1) e^ln2 =x
2) ln(1/sqrt(e))=x
3)(1.45)^x=25
4)10=22(0.87)^q

Pre Calculus

03/02/14

#### sqrt e^9t =e^t

could some one help me with this pre-calc question please ? Logarithms and their properties

Pre Calculus

03/02/14

#### e^3x=1/e^5

Could someone please help me with this pre-calc question ? thanks ? :)

02/03/14

#### How do you expand ln(4x)(y^1/5)

I am wondering how to expand this log function. This description needs to be 20 words long but you don't need that many to describe this problem. Ya feel?

Pre Calculus

01/22/14

#### cos^2x(sinx) simplify the expression

I have no idea what to doafter this. I got to
cos^2x/sin^2x (sinx)

Pre Calculus

12/08/13

#### how to factor f(x)=6xcubed-7xsquared-89x+140 completely

This is a pre-calculus question. Its chapter 4 in the Holt pre-calculus textbooks.

Pre Calculus Quadratic Equations

11/05/13

#### How do I write this is standard form: y= 2(t-1)^2+12

How do I write this equation in standard form? ax^2+bx+C

10/14/13

#### p(x)+p(5), if p(r)=4r^2+5

p(x)+p(5), if p(r)=4r^2+5 I do not understand how to do this question I have read over the chapter and I still don't understand how to do this function.

Pre Calculus

08/30/13

#### In the equation 3x+2y=9, if x increases by 2 then y does what?

Increases by 2
Decreases by 6
Increases by 3
Increases by 6
Decreases by 3

04/22/13

#### -sin^2=2cosx-2

solve the following equation...I am confused...
what i have so far:
2cosx-2+sin^2=0
....

Pre Calculus

04/05/13

#### 3^(2x)+28=11(3^x)

I can't figure out how to start solving it. Haven't used this site before, please help?
I have to find the exact solution in simplified form.

Pre Calculus

02/04/13

#### The focus of a parabola has coordinates (0,-3/10) and the vertex at the origin. Find the equations of the directrix, the axis of symmetry, and the parabola.

This has to do with the focus and directrix of a parabola.

Pre Calculus

10/29/12

#### y=(x^2-x-2)/(x^2-16)

I am trying to find the y-intercepts without using a graphing calculator. How do I go about with that equation?

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