2,208 Answered Questions for the topic Pre Calculus

04/27/15

Precalculus help! ASAP quadratic equations
solve the following:a) 3(2z+3)2-9(2z+3)-30 = 0b)0.49k2-36m2= 0
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04/27/15

Determine the roots answer asap please
determine the roots of the quadratic equation.(complete the square) express your answer in exact values.5x2+20x-1=0
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Pre Calculus

04/24/15

In triangle ABC Angle A=90degrees, angle b=25 degrees and sideA=18. Find the length of side c
Answer choices are 7.5,16.3, and 8.2
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Pre Calculus

04/24/15

Conversions
A hummingbird needs 10 grams of sugar and 8 grams of protein each day. One honeysuckle flower provides 20 mg of sugar and 10 mg of protein. One nasturtium flower provides 10 mg of sugar and 10 mg... more
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Pre Calculus

04/20/15

How to prove the identity
COT^2x+COS^2x+SIN^2x=CSC^2x
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Pre Calculus

04/19/15

plot the following points: A(-8,12) B(8,-8) C(-8,-8) D(18,4). Find each distance
1.What is area of triangle ACB? 2. What is perimeter quadrilateral ACBD..show work
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Pre Calculus

04/19/15

(x - 5)2 +(y + 2)2 =16
Radius  Center 
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Pre Calculus

04/17/15

Word Problem
An investor has $40,000 to invest in three types of bonds: short-term, intermediate-term, and long-term. How much should she invest in each type to satisfy the given conditions?   Short-term... more
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Pre Calculus

04/12/15

Find the value of K. Use the model to find the popultaions of the city in 2010. According to the model, during what year will the population reach 530,000?
Pre Calculus problem. The populations P(in thousands) of a certain city from 2000 through 2007 can be modeled by P= 347.8e^kt, where t represents the year, with t= 0 corresponding to 2000. In... more
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Pre Calculus

04/10/15

Find the angles between their courses.
Pre-calculus   A cruise ship and a freight train leave port at the same time and travel straight line courses at 30km/hr, respectively.Two hours later they are 50 km apart. Find the angles... more
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Pre Calculus

04/09/15

The monthly average precipitation location caries sinusoidally from maximum of 8 inches in January to a minimum of 2 inches in July.
Find the cosine function for precipitation in terms of time t. Include a sketch of the graph. 
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Pre Calculus

03/23/15

what is the point slope form of: passing through (9,-4) and perpenicular to the line whose equation is x-9y-7=0?
what is the point slope form and general form
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Pre Calculus Algebra 2 Calculus

03/16/15

I'm having trouble on this problem, I've been trying to solve it for a while now... Can you explain how to solve it?
Suppose a nurse records the temperature of healthy men and women. The table represents the mean and standard deviations of the data.                         Women. |  Men. Fahrenheit   98.4±0.7... more
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Pre Calculus

03/12/15

the wheels of a car have a radius 11 in and are rotating at 1500 rpm. find the speed of the car in mi/h
please round answer to the nearest tenth. Use Pi=3.1416
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03/10/15

Exponential and logarithmic function
Logistic Growth unrestricted growth because of limited habitat and food sup- plies. Under such conditions the population follows a logistic growth model:p(t)=d/1+ke^-ctwhere c, d, and k are... more
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03/09/15

Exponential and logarithmic functions
Carbon Dating The age of an ancient artifact can be determined by the amount of radioactive carbon-14 remaining in it. If D0 is the original amount of carbon-14 and D is the amount remaining, then... more
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03/09/15

the neutral exponential function
Radioactive Decay A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t)= 13e^-0.015t where m(t) is measured in kilograms. (a)... more
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Pre Calculus

03/09/15

please help me! finals tomorow :(
find the first five terms of {2n/3n+1} a1=-2 an+3an-1?
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Pre Calculus

03/09/15

IM Desperate please help finals tomorow!!! find the first term and common difference of an arithmetic sequence whose fourth term is 3 and 20th term is 35
find the first term and common difference of an arithmetic sequence whose 4th term is 3 and 20th term is 35  
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Pre Calculus

03/09/15

i need help pleaseeee!
given v=-2i+j and w=4i-3j find ||v-w|| please!
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Pre Calculus

03/06/15

Solve using logarithmic
given: populations of 2 towns Springfield: f(t)=200(2)^t/3shelbyville:g(t)=500(1/4)^t/5when will springfeikd and shelbyville have the same populatio? What is that populatio?  With explaintion and... more
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Pre Calculus

03/05/15

find the exact value of cos(75) + cos(15)
using sum and difference formulas for cos
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03/04/15

Solve each equation using the designated method
Solve 2x^2 + 8x -4 = 0 by completing the square.   Solve (x^2 +x)^2 -3(x^2+x) +2=0 using substitution, factoring, and the quadratic formula
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02/07/15

For each of the equations below, determine algebraically if the graph of that equation is symmetric with respect to x-axis, y-axis, and origin.
(a)  x2+1/x3 = y2   (b)  lxl x3 = ³√y
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02/02/15

Find Equation of line AB, is A(2,4) and B(1,3). Then find the equation of perpendicular to line segment AB
Find Equation of line AB, is A(2,4) and B(1,3). Then find the equation of perpendicular to line segment AB
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