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November 28, 2014

Posts by coried


Total # Posts: 17

College Algebra
Solve the system of equations using matrices. If system has no solution say its inconsistent. 6x + y = 5 3x - y + z - w = 8 z + w = 2 Solve the system of equations using Cramers Rule if applicable. 4x + 2y = 8/5 5x - 5y = 5
September 13, 2009

Algebra
The function f is one to one. Find its inverse. f(x) = 8x^2 - 9, x>=0
August 26, 2009

Word Problem
The surface area of a balloon is given by S(r) = 4(pie)r^2, where r is the radius of the balloon. If the radius is increasing with time t, as the balloon is being blown up, according to the formula r(t)=4/5t^3,t>=0, find the surface area S as a function of the time t.
August 26, 2009

College Algebra
typo those answers contain L's not I's
August 26, 2009

College Algebra
Solve the equation. e^5x = 2 a. 2/5 e b. in2/5 c. 5 in 2 d. in5/2
August 26, 2009

College Algebra
The function f is one to one. Find its inverse. f(x) = 8x^2 - 9, x>=0
August 26, 2009

Algebra
What is the domain of the function f(x)=sqrt(x^4-16)? In interval notation. Please show me how to work this problem out. I cannot find any examples in my book. Thanks!
August 18, 2009

Algebra
When making a phone call using calling card a call lasting 3 minutes costs $1.60. A call lasting 10 minutes costs $4.40. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that relates to the cost of making the call y, to the ...
August 11, 2009

Algebra
find the center (h,k) and radius r of the circle with the given equation: x^2 + y^2 + 6x - 8y = 56
August 11, 2009

Algebra
If a circle of radius 5 is made to roll along the x-axis, what is the equation for the path of the center of the circle?
August 11, 2009

Algebra
find the center (h,k) and radius r of the circle with the given equation: x^2 + y^2 + 6x - 8y = 56
August 11, 2009

Algebra
Word problem: When making a phone call using calling card a call lasting 3 minutes costs $1.60. A call lasting 10 minutes costs $4.40. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that relates to the cost of making the call...
August 11, 2009

Algebra
Word problem: Ken and Kara are 29 miles apart on a calm lake paddling towards each other. Ken paddles at 3 miles per hour. Kara paddles at 6 miles per hour. How long will it take them to meet?
August 5, 2009

Algebra
Word problem: Radiator in a certain make needs to contain 50 liters of 40% antifreeze. The radiator now contains 50 liters of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength?
August 5, 2009

College Algebra
Write expression as a single quotient (49-x^2)^1/2 + 3x^2(49-x^2)^-1/2 ________________________________ 49 - x^2
July 24, 2009

college alegbra
factor... (x+4)^-3/5+(x+4)^-1/5+(x+4)^1/5 Please explain the process used to solve this type of expression. Answer should be in equation form if that helps....
July 24, 2009

college alegbra
simplify result leave in factored form 1-7/x _____ 1+7/x
July 24, 2009

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