Tutors Answer Your Questions about Polynomials-and-rational-expressions (FREE)
Question 261713: A market research company finds that at a price of p=$20., they would sell x=42 tiles each month. If they lower the price to p=$10., then more people would purchase the tile, and they can expect to sell x=52 tiles in a months's time. Find the equation of the line for the demand equation. Write your answer in the form p=mx+b. Hint: write an equation using two points in the form (x,p).
My biggest problem is I am not sure about the demand equation, I am not real clear on what I am suppose to be figuring out in this problem. I have several other problems which depend on my having this base correct. I am totally blank and have read everything I have on this and I must be over looking or thinking this out. Please help me.
Click here to see answer by Theo(13342)   |
Question 262616: 1.SIMPLIFY AND WRITE WITH POSITIVE EXPONENTS 9X(X^-3)/18X^15
I DID THIS AND NOW IM STUCK:9X(1/X^-3) THEN I GOT 9X/18X^15X^-3 = 9X/18X^12 = X/2X^12 NOW IM STUCK ...HELP?
2.WRITE WITHOUT NEGATIVE EXPONENTS=(3X^-4Y^2)^-3 = (1/3X^-4Y^2)^-3 = 3*3*3 X^-4+3 Y^2+3 = 1/27X^-1Y^5 I NEED HELP IM ALSO STUCK.
Click here to see answer by stanbon(75887) |
Question 262821: Consider any integer x. The next consecutive integer can be represented by the binomial (x+1).
a. write a polynomial for the sum of any two consecutive integers
b. explain how you can be sure that the sum of any two consecutive integers is always odd. Use the polynomial form part (a) in your explanation
Click here to see answer by drk(1908) |
Question 262846: I do not know where to start.
A red ball and a green ball are simultaneously tossed into the air.
Find a polynomial D(t) that represents the difference in the heights of the two balls. The red ball is given an initial velocity of 96 feet per second, and its height t seconds after it is tossed is -16t^2 + 96t feet. The green ball is given an initial velocity of 80feet per second, and its height t second, and its height t seconds after it is tossed is -16t^ + 80t feet. How much higher is the red ball 2 seconds after the balls are tossed? In reality, when does the difference in the heights stop increasing?
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 262846: I do not know where to start.
A red ball and a green ball are simultaneously tossed into the air.
Find a polynomial D(t) that represents the difference in the heights of the two balls. The red ball is given an initial velocity of 96 feet per second, and its height t seconds after it is tossed is -16t^2 + 96t feet. The green ball is given an initial velocity of 80feet per second, and its height t second, and its height t seconds after it is tossed is -16t^ + 80t feet. How much higher is the red ball 2 seconds after the balls are tossed? In reality, when does the difference in the heights stop increasing?
Click here to see answer by drk(1908) |
Question 262895: My son is trying to learn how to factor when either square is a square of a polynomial. Such as this problem: 9a^2-(2a-5)^2. I know the answer from the teacher book is 5(a-1)(a+5)^2, but I can't explain to him how to work it. Any help is appreciated.
Phebe Little, for my son Micah, who is in Algebra I
Click here to see answer by checkley77(12844) |
Question 262904: Pseudoephedrine hydrochloride is an allergy medication. The polynomial L(t) = 0.03t^4 + 0.4t^3 – 7.3t^2 + 23.1t, where 0 <= t <= 5, models the level of pseudoephedrine hydrochloride, in milligrams, in the bloodstream of a patient t hours after 30 milligrams of the medicine have been taken.
At what times, to the nearest minute, does the level of pseudoephedrine hydrochloride in the bloodstream reach 12 milligrams?
Click here to see answer by drk(1908) |
Question 263110: P dollars is invested at annual
interest rate r for 1 year. If the interest is compounded
semiannually, then the polynomial P(1+r/2)^2 represents the value of the investment after 1 year. Rewrite this expression
without parentheses. Evaluate the polynomial if
P = $200 and r = 10%.
Click here to see answer by drk(1908) |
Question 263141: The equation D=1.2 sqrt h gives the distance, D in miles that a person can see to the horizon from a height, h, in feet. A technician can see 30.4 miles to the horizon from the top of a radio tower. How high is the tower? (Replace the known values in the equation D=1.2 sqrt h)
Click here to see answer by drk(1908) |
Question 263137: After an accident, polie determine the spped at which the car had been traveling based on the length of the skid marks the car left on the road. The police use the following formula: r= 2(over)/(5L)^-1/2, where r is the speed of the car, in miles per housr, and L is the distance of the skid marks, in feet.
A. Solve the equation r= 2(over)/(5L)^-1/2 for L. (Apply rule of negative and fractional exponents before solving for the variable L.)
B. How far will a car skid at 65 mph? Round your answer to the nearest whole, feet if necessary. (Use your equation in 1A and replace the known values in the equation.
Thanks!!!
Click here to see answer by stanbon(75887) |
Question 263138: After an accident, polie determine the spped at which the car had been traveling based on the length of the skid marks the car left on the road. The police use the following formula: r= 2(over)/(5L)^-1/2, where r is the speed of the car, in miles per housr, and L is the distance of the skid marks, in feet.
A. Solve the equation r= 2(over)/(5L)^-1/2 for L. (Apply rule of negative and fractional exponents before solving for the variable L.)
B. How far will a car skid at 65 mph? Round your answer to the nearest whole, feet if necessary. (Use your equation in 1A and replace the known values in the equation.
C. How far will a car skid at 100 mpg? Round your answer to the nearest whole feet, if necessary. (Use your equation in 1a and replace the known values in the equation.)
Thanks!!!
Click here to see answer by drk(1908) |
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