477 Answered Questions for the topic Precalculus Homework

Precalculus Homework

01/27/16

Express the number in the form a/b, where a and b are integers.
Express the number in the form a/b, where a and b are integers. 4-²/ 5-²  
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Precalculus Homework Functions Word Problem

01/27/16

Write a formula for f(x)
Let f(x) be defined on the positive real numbers as follows:Start with a number x.Take the square root of the number and add 5 more than the number you started with.Square the result and add 7 more... more
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Precalculus Homework

01/27/16

Let f(x) = 7 x2 + 6 . Evaluate f ( 1 + v 2 ) . IMPORTANT: Provide an exact expression, not a decimal approximation
I keep getting 27+ 7√2 but this is incorrect.
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Precalculus Homework Word Problem

01/26/16

The population dynamics of many fish are characterized by extremely high fertility rates among adults and very low survival rates among the young.
The population dynamics of many fish are characterized by extremely high fertility rates among adults and very low survival rates among the young. A mature specimen of a particular fish may lay as... more
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01/25/16

Please help me with function decomposition? Pre-Calculus?? Very confused!
1. Given the composition h(x)=f(g(x)) If h(x)=(x+3)^8 and f(x)=x^8, find the function g(x).           2. Given the composition h(x)=f(g(x))If h(x)=1/x+3 and g(x)=x+3 , find the function... more
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Precalculus Homework Pre Sale homework

01/19/16

50-e^-.02x=200
Have to solve for x. 
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Precalculus Homework

01/19/16

Force of 90lb acts on An object at an angle of 55 degrees. A 2nd force of 100lbs acts in object at angle of -60 degrees. Find direction & magnitude of force
Need help on this please
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Precalculus Homework

01/19/16

Find direction angle of vector <-2,-7>. Give direction angle as an angle in [0degrees,360degrees) rounded to the nearest tenth.
I need help on this part of my homework.
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Precalculus Homework

01/18/16

If a sample of an element has a mass of 7.7grams and contains 0.285moles, what is the element?
I need help on this. I am clueless
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01/13/16

Graphing Trig. Functions & Inverses
Evaluate In degrees:   1. Sin^-1 (-2pi)    2. arctan (- square root 3/3)   3. sin (cos^-1(- square root 3/2)      Evaluate in Radians   1. Arctan (-1)   2. cos^-1 (- 1/2) 
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Precalculus Homework

01/10/16

I'm not sure which law or how I'm supposed to solve this problem (law of sine or law of cosine)
A restaurant is located at the intersection between Walker Street and Throop Street. Heather's house is on Walker Street and it is 2.6 miles from the restaurant. Patricia's house is on Throop... more
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Precalculus Homework Compound Interest

01/07/16

I don't quite understand what I'm doing wrong with this question. Please help.
Hannah would like to make an investment that will turn 6000 dollars into 25000 dollars in 8 years. What quarterly rate of interest, compounded four times per year, must she receive to reach her... more
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Precalculus Homework

01/06/16

The "minute hand" of a clock is 5 inches long.
What is the angular speed of the "minute hand" in rad/min?   How many inches does the tip of the minute hand travel each min?   I need exact answers for both, and please show work!
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Precalculus Homework

01/06/16

Angular and Linear velocity?
A wheel spins through 31 revolutions per minute. Find the angular velocity and the linear velocity if the radius of the wheel is 1.7 feet.
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Precalculus Homework

01/06/16

Pre Cal Question
evaluate in Degrees:   1. sin^-1(-square root 3 / 2)   2. arctan(square root 3)    3. arcsin (0)   4. sin(cos ^-1 (-squareroot 3 / 2))
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Precalculus Homework Precalculus

01/06/16

A truck with 18-in.-diameter wheels is traveling at 55 mi/h.
Find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes   How many revolutions per minute do the wheels make?   Please show work.
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Precalculus Homework

12/17/15

How long does it take for a deposit of $500 to double at 7% compounded continuously?
How many years does it take to double? ______years________days
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Precalculus Homework

12/17/15

Find all real numbers in the interval [0, 2p) that satisfy the equation. Use radian measure 11 sin ² x – sin x = cos ² x
The solution set is {-- --}. (Round to the nearest tenth as needed. Use a comma to separate answers as needed)
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Precalculus Homework

12/15/15

Find the product of -4-3i and its conjugate. The answer is a+bi where
the real number a equals the real number b equals  
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Precalculus Homework

12/03/15

how do you solve 3/x+x/10=11/2x
it is not addition but multiplyign a common factor from the numerator. the answer is 10x
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Precalculus Homework

12/01/15

trig functions
Use a sum or difference formula to determine the value of the trigonometric function.cos(9 pi/4+ 5 pi/6
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Precalculus Homework

11/19/15

A rectangle is inscribed in the ellipse 10x^2+15y^2=150. write the area of the rectangle as a function of one variable (x).
I know the answer is A(x)=4x square root 150-10x^2/15, but I have no clue how to do the problem!
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Precalculus Homework Precalculus Honors

11/10/15

A coin is tossed, and a card is pulled from a standard deck. Find the probability of the following. a tail on the coin or a heart
This question is a probability question, that does not include the simple 1/2 + 13/52. I already tried that and got it wrong. It seems that there is more to the question and I honestly do not get it.
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Precalculus Homework Functions

11/09/15

Find the time it hits the ground and the time it reaches its highest point.
A pomegranate is thrown from ground level straight up into the air at time t=0  with velocity 96 feet per second. Its height in feet at t  seconds is f(t)=−16t^2 +96t  . Find the time it hits the... more
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Precalculus Homework Functions

11/09/15

h(t)=-4.9t^2 + 100t+206
NASA launches a rocket at t=0  seconds. Its height, in meters above sea-level, as a function of time is given by h(t)=−4.9t^2 +100t+206  . A) Assuming that the rocket will splash down into the... more
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