188 Answered Questions for the topic Precalc

08/31/19

Math Review Help
A skateboard ramp will have a height of 12 in. and the angle formed between the ramp and the ground is 30 degrees. To the nearest inch, what will be the length L, of the ramp?
Follows • 2
Expert Answers •1

08/28/19

Determine whether f(x)=5x+1/x and g(x)= x/5x+1 are inverse functions
Determine whether f(x)=5x+1/x and g(x)= x/5x+1 are inverse functions. Explain how you know.
Follows • 1
Expert Answers •2

04/07/19

How do you convert a shifted parametric circle equation to rectangular form?
x=-2cos((1/2)t-(π/2))+23y=2sin((1/2)t-(π/2))+6specifically, how do you separate the stuff inside the cos/sin parenthesis to eliminate a parameter? I find all kinds of solved simple circle... more
Follows • 1
Expert Answers •1
Precalc Precalculus

03/20/19

What angle in radians corresponds to 3.83 rotations around the unit circle?

Follows • 1
Expert Answers •1
Precalc

10/30/18

the equation of the tangent line to th curve at the point x=3

equation is 4/(x-1) i got the derivative as -4x/(x-1)^2
Follows • 1
Expert Answers •1

09/18/18

What is the height function?
The height s above the ground at time t of a falling object is given by s(t) = −5t2 + v0t + s0 where s is in meters, t is in seconds, v0 is the object's initial velocity in meters per second and s0... more
Follows • 2
Expert Answers •1
Precalc Precalculus

04/02/18

Precalc question - please help! What's wrong with this answer?
The question is:   A student was given the problem: "Solve x2 > 4" The student wrote the following response: STEP 1: x2 > 4 STEP 2: √x2 > ±√4 STEP 3: x > ± 2STEP 4: So, the... more
Follows • 2
Expert Answers •1

03/15/18

Find a function that models the surface area of a cube in terms of it's volume.
I'm really struggling with this problem:   Find a function that models the surface area of a cube in terms of it's volume.   I got that V = x3 and S = 6x2 but I can't figure out how to write... more
Follows • 2
Expert Answers •1

02/23/18

Precalc problem- finding all real solutions
Can someone help me find the solutions of this equation? I tried a few times but I can't seem to get the right answer.   1 +          2x         =  2     +  4         (x + 7)(x + 6)   x+7     x+6... more
Follows • 4
Expert Answers •3

02/23/18

Precalc problem- finding all real solutions
Can someone help me solve this precalc problem? I'd really appreciate it!   Find all real solutions of the equation. (Enter your answers as a comma-separated list. If there is no real solution,... more
Follows • 3
Expert Answers •2

02/23/18

Precalculus Math Problem - Finding all real solutions
Can someone help me solve for this? I tried a couple of times and can't seem to get the right answer. Thank you for any help!   Find all real solutions of the equation. (Enter your answers as a... more
Follows • 2
Expert Answers •1

02/23/18

Precalculus Math Problem
I'm not sure how to approach this problem and I'd really appreciate any help!If a ball is thrown directly upward with a velocity of 36 ft/s, its height (in feet) after t seconds is given by y = 36t... more
Follows • 3
Expert Answers •2

11/05/17

How do I solve this problem?
im having trouble on my Precalc homework. This is the problem: “a box is formed by removing squares of side length x inches from each corner of a rectangular piece of cardboard 10 inches wide by 16... more
Follows • 2
Expert Answers •1

10/14/17

Can someone explain and help me solve this?
2x^(1/2)-9x^(1/4)+4
Follows • 2
Expert Answers •1
Precalc

10/10/17

Define a function h that determines the area of the picture and frame in terms of the width of the picture, w
Tucker is using a one-inch frame for a picture where the length of the picture, l, is 2 inches less than the width of the picture, w
Follows • 2
Expert Answers •1
Precalc

09/10/17

A square plot of land has a building 70 ft long and 60 ft wide at one corner.
The rest of the land outside the building forms a parking lot. If the parking lot has area 12,700 ft2, what are the dimensions of the entire plot of land?
Follows • 2
Expert Answers •1
Precalc

08/08/17

The monthly average high temperature, y, in degrees Fahrenheit at Phoenix, Arizona, can be modeled by y = 20.3sin(0.53x−2.18) + 83.8 where x = 1 corresponds to
The monthly average high temperature, y, in degrees Fahrenheit at Phoenix, Arizona, can be modeled by y = 20.3sin(0.53x−2.18) + 83.8 where x = 1 corresponds to January, x = 2 corresponds to... more
Follows • 2
Expert Answers •1

07/29/17

find the sum 8+6+4+(8/3)+...
Is this even possible? I cannot find a correlation from a1 to a2 to a3.... so on. It's not Arithmetic or Geometric  
Follows • 2
Expert Answers •2
Precalc Precalculus

05/10/17

Convert to a logarithmic equation
a)  3x=5   b) s=e2t
Follows • 2
Expert Answers •1
Precalc Precalculus

05/09/17

What is the remainder when x^4-2x^3+x+5 divided by x+1?
What is the remainder when x^4-2x^3+x+5 divided by x+1?
Follows • 2
Expert Answers •1
Precalc

04/17/17

Prove trig identity.
cos(2x)+sin^2 x = 1/2 sin(2x) cot x.
Follows • 2
Expert Answers •1

02/27/17

I'm having trouble with several questions listed below:
1. Find the exact value of cos(t/2) if sin(t) = -7/25 and pi < t < 3pi/2    2. Find all the solutions in the interval [0,360]        cos(2x)= - sqrt3/2   
Follows • 3
Expert Answers •1

02/14/17

PRECALCULUS HELP: inverse of a equation
The functionf(x) = −12 x^2 + 6x + 5is not invertible, however the domain can be restricted so that the function is invertible only on the restricted domain. There are many ways to do this. One way... more
Follows • 3
Expert Answers •2

02/14/17

IMMEDIATE HELP NEEDED: f(x) = −12 x^2 + 6x + 5Using your value of a determine the domain for which f(x) is invertible. Provide your answer in interval notation.
The functionf(x) = −12 x^2 + 6x + 5is not invertible, however the domain can be restricted so that the function is invertible only on the restricted domain. There are many ways to do this. One way... more
Follows • 1
Expert Answers •1
Precalc

12/08/16

Solve the problem- precalc
A. $20000.  B.$61000.  C. $18000.  D. $41000   A 122000 trust is to be invested in bonds paying 7%, CDs paying 5%, and mortgages paying 9%. The bonds and cds investment must equal the mortgage... more
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.