# 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

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

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.

College Algebra
typo those answers contain L's not I's

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

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

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!

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 ...

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

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?

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

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...

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?

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?

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

college algebra
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....

college algebra
simplify result leave in factored form 1-7/x _____ 1+7/x

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