1,744 Answered Questions for the topic Functions

Functions

11/08/17

James joined a DVD Club. You Pay $25 for the first DVD and every other DVD after that is $5. Create a function for the price, p, you pay for, d, DVDs.
Write a function. find y intercept find domain and range
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11/08/17

g(n) = 3n + 2, f(n) = 2n^2 + 5...find g(f(2))
g(n) = 3n + 2 f(n) = 2n2 + 5   find g(f(2))
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11/08/17

g(n) = 3n + 2,f(n) =2n^2 + 5,find (g o f)(2)
g(n) = 3n + 2  f(n) = 2n2 + 5   find (g o f)(2)
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Functions

11/07/17

given that f(x)= 5x and g(x)= x-2, determine x when fg(x)= 0
given that f(x)= 5x and g(x)= x-2, determine x when fg(x)= 0
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11/01/17

sum, difference, and product of two functions
suppose that the functions f and g are defined for all real numbers x as follows. f(x)=3x^2 g(x)=x+4   (g - f)(x) = ____ (g + f)(x) = ____ (g * f)(2) = ____    Thanks! :D 
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11/01/17

sum, difference, and product of two functions
suppose that functions r and s are defined for all real numbers x as follows. r(x)=3x-6 s(x)=6x   write the expressions for (r - s)(x)=____ (r + s)(x)=____ (r * s)(-1)=____
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11/01/17

sum, difference, and product of two functions
Suppose that the functions g and h are defined for all real numbers x as follows. g(x)=2x h(x)= 4x^2    Write expressions for  (g + h)(x)= ___ (the "." is supposed to be for... more
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Functions

11/01/17

l(f) = 12f if the output number is 60, what was the input number?
one foot is equal to 12 inches. the function l(f) takes a length in feet (as input) and returns a length in inches (as output).
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Functions

10/28/17

If g(x)=14x+12 find x if g(x)=0
I am having trouble with this problem and I need answers
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Functions

10/27/17

A bacteria culture contains 1300 bacteria initially and doubles every hour. (a) Find a function N that models the number of bacteria after t hours. N(t) =
What is the number of bacteria after 24 hours?
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10/27/17

f(x) = x^2 - 4x - 1 and g(x) = 3x...Find (f+g)(x)?
combination of functions
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10/22/17

does this function exist?
for the function Q(x) = 6e0.04x does Q-1 exist?   if yes find it and evaluate to 4 decimal places Q(9) and Q-1(9) 
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10/22/17

inverse equation
for the function Q(X) = 6e0.04(x) does Q-1 exist?
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10/18/17

1. Draw the graph of the function f(x) = |x| + 1 for the domain –5 ≤ x ≤ 5.
Name the followinga) y-intercept:b) x-intercept:c) Vertex:d) End Points:   PLEASE HELP!!!
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Functions

10/14/17

how do i prove the arithmetic operations on functions
I'll like to have like a general idea of how it works using notations and dummy letters 
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Functions

10/12/17

Why the function is X E R?
1) (ii) Find the range of values of k for which the equation e^x – 5 = k has no solutions. [1] Ans k less than or equal to 5      ( Please explain how to get the answer)   2) Function g is such... more
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10/12/17

How to solve this?
If f(x) = 3x-5, find f(x+h)—f(x)/h
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10/11/17

Inverse Functions
If f(x)=(x+2)/(x+9), then f^-1(-4)=?
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10/11/17

One to One Functions
If g(x) is one-to-one and g(-8)=4, then (g(-8))^-1=?
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10/11/17

Find the Function
Find the function of the form f(x)=a+bcos(cx) that is tangent to the line y=1 at the point (0,1), and tangent to the line y = x + (3/2) - (pi/4) at the point (pi/4, 3/2).
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Functions

10/10/17

how do i solve this?
If f(x-1)=2x+3 for all values of x,What is the value of f(-3)? a)-7 b)-5 c)-3 d)-1 btw ik the answer is -1 but idk how i solve it the proper way what is did was replace -3 on both sides and... more
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10/08/17

Rate of Change
Find the average rate of change of f(x)=3/x+1 on the interval [x,x+h]. Simplify your answer.
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10/07/17

A question relating to function
Let f(x)=√x and g(x)= 3x+b. What is the value of b if we know that the graph f(g(x)) passes through the point (4,8)
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Functions

10/02/17

There was a sample of 600 milligrams of a radioactive substance to start a study. Since then, the sample has decayed by 7.9% each year. Let t be the numbe
I need help with this problem>>>  There was a sample of 600 milligrams of a radioactive substance to start a study. Since then, the sample has decayed by 7.9% each year.Let t be the... more
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09/30/17

Intuition on horizontal stretches and compressions of graphs
Given f(x)=af[b(x-h)]+k, why does the graph stretch horizontally by a factor of 1/b, but not by a factor of b?
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