188 Answered Questions for the topic Precalc

09/14/16

In 1999 there were 4076 J.C. Penney stores and in 2010 there were 1106 stores.
Write a linear equation that gives the number of stores in terms of the year. Let t= 9 represent 1999. Then predict the numbers of stores for the years 2016 and 2018. Are your answers reasonable?... more
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08/06/16

Determine all non permissible values
Determine all the non-permissible values of    f(x)= (x^2-1)/(x^2-x-6)
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07/24/16

Find x in the equations
 f(x)=lx-1l     g(x)=-lx+1l+4
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07/24/16

Look for the intersections of the functions
f(x)=2x^2-3x+1   g(x)=-x^2+2x+3   Give your answers as coordinates (a,b)
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06/20/16

if the radius of the circle in the figure is 20 cm and length equals 85 cm, what is the radian measure of angle
If the radius of the circle in the figure is 20 cm and length equals 85 cm, what is the radian measure of angle?
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Precalc

03/20/16

An egg salesman has 5 dozen eggs that he will sell for $1.00 per dozen. Before they can be sold, they must pass an inspection.
An egg salesman has 5 dozen eggs that he will sell for $1.00 per dozen. Before they can be sold, they must pass an inspection. Three eggs are selected at random. If all three are good, the... more
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02/28/16

Exponential Growth Problem Involving bacteria population??! PLEASE HELP!!! - Precalculus
I am really stuck on this question, particularly questions 3 and 4. Could you please show how you get the answers to those questions and explain? I have been stuck on those for a while and would... more
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02/26/16

The count in a bateria culture was 100 after 15 minutes and 1800 after 30 minutes.? Find the population in 95 minutes? EXPONENTIAL GROWTH PROBLEM!? PLEASE HELP
The count in a bateria culture was 100 after 15 minutes and 1800 after 30 minutes. 1. What was the initial size of the culture? Round your answer to the nearest bacteria. 2. Find the doubling... more
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Precalc

01/22/16

Rectangular coordinate (-2,5) is given. Find all polar coordinates that satisfy.
Need help as fast as you can. Also need tutor
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Precalc

01/21/16

Elimante parameter. x=t+4, y=t^2
need help on this fast please
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Precalc

01/19/16

Find the work done by a force F of 36lb acting in the direction of (3,5) in moving an object from (1,2) to (6,8)
I need help with this.
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12/21/15

Please prove that cot A + cot B + cot C = (a^2 + b^2 + c^2)/(4(area of triangle ABC)).
I need help with this proof. Please help me. 
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Precalc Math

12/21/15

Solve, can not cross multiply, need to verify so you can only change one side.
√(6)-√(2) = √(2-√(3))       4                2    
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Precalc

12/01/15

pre calc question
The lengths of the sides of a triangular parcel of land are approximately 500 feet, 600 feet, and 950 feet. If land is valued at $2000 per acre (1 acre is 43,560 ft2), what is the value of the... more
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Precalc

12/01/15

sin x precalc
Use a graphing device to approximate, to one decimal place, the solutions to the equation. (Enter your answers as a comma-separated list.)sin x + 17x = x3
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09/14/15

find the length of the side of the square, given its 3 inches shorter than the diagonal
The side of a square is 3 inches shorter than the length of the diagonal. Find the length of the side.
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09/14/15

find the lengths of the triangle and the square
the sides of an equilateral triangle are one unit more than the sides of a square. If the sum of their perimeters is equal to 107 inches, then find the lengths of the sides of both the square and... more
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Precalc

09/10/15

the distance between x and -12 is at least 2
use absolute value notation to describe the situation
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08/01/15

I have no idea how to find an angle when you have 2 sides of a right triangle
It is a right triangle with two unknown angles and one unknown side length. The present lengths are 8 and 11. I need to find one of the angles. Please help!
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07/31/15

I found an answer to my problem but I don't think its simplified. Here it is:
cosine 48= 13/x .6691=13/x 1/13 ∗ .6691 = 13/x ∗ 1/13 .6691/13=x   Can my answer be simplified further?!? Please help me!
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Precalc Precalculus

07/31/15

9x2+4=2x Solve using the quadratic formula.
9x2+4=2x Solve using the quadratic formula  PLEASE RESPOND ASAP
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06/08/15

Sonic boom trig question
The US Air Force was running maneuvers with the F22 Raptor, flying low enough so that you could see the shock cone created as the jet flies overhead at supersonic speeds. You wanted to take a video... more
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06/03/15

As a ship sails into the harbor, the navigator sights a buoy at an angle of 20 degrees to the path of the ship.
This ship sails 200 meters farther and finds that the buoy now makes an angle to 38 degrees. 1) How far is the ship from the buoy at the second sighting? 2) What is the closest the ship will ever... more
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04/28/15

Which of the 10 digits does A Represent
in the following problem? (A, S, M, and N are all different)   AS * A = MAN
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04/28/15

Fifty percent more than what number is 25 percent less than 60 percent more than 10?
please help! Percents arent my thing... 
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