posted by .

1. The range of f ( x ) = ax + b is the set of all real numbers given that a and b are real numbers. Which produces a counter examples to her statement ?

A. a = 0
B. b = 0
C. a < 0
D. b < 0

My answer I came up with was b or c I was not sure.

2. f ( x ) = - 6
x -1 and g ( x ) 4 x^2
select the solution for ( f +g ) ( x )

A. - 6 x - 1 + 4 x ^ 2
B. - 24 x^3 - 4 x^2
C. 24 x^2 - 1
D. - 6 x - 1 24 x^2

My answer I came up with is C.

3. f ( x ) = - 6 x - 1 and g ( x ) = 4 x^2 select the solution for ( f g )( x )

A. - 6 x - 1 + 4 x^2
B. -24 x^3 -4 x^2
C. - 24 x^2 - 1
D . -24 x^5

My answer I came up with was either C or D. was not sure.

4. The profit ( p) , in dollars , for a company is modeled by the function P ( x ) = - 750 x^2 + 15,000 x , Where x is the number of items produced. For which x is the number of items produced. For which values of x will the company lose money ?

A. x > 20
B. 2 < x < 10
C. 10 < x < 20
D. x < 2

My answer I came up with was A.

5. The function h ( x ) = 1 / 98 x^2 describes h ( x ) , the height of part of a roller coaster track , where x is the horizontal distance in feet from the center of this section of the track, The towers that support this part of the track are the same height and are 150 feet apart, which is the best estimate of the height of the towers ?

A. 121.2 feet
B. 85. 7 feet
C. 229. 6 feet
D. 57.4 feet

My answer I came up with was C. I am not sure .

• MATH I NEED HELP PLEASE -

#1 is (A) because then f(x) = 0x+b = b
and the range is just y=b

#2 (f+g)(x) = f(x) + g(x). So, (A)

#3 (fg)(x) = f(x) * g(x) = (-6x-1)(4x^2). So, (B)

#4 P(x) = - 750 x^2 + 15,000 x = 750x(20-x)
This is a parabola with roots at x=0,20
Since it opens downward, P(x) is positive only between the roots.
So, (A)

#5 Since the poles are 150 apart, -75<=x<=75
h(75) = 1/98 x^2 = 1/98 * 75^2 = 57.4
So, (D)

• MATH I NEED HELP PLEASE -

Thank you Stevie

• MATH I NEED HELP PLEASE -

find the function h(x)=1/98 x^2

Similar Questions

1. algebra

Find the domain and range of the function. 1. f(x)= x^2-x I got: Domain= All Real Numbers Range= All Real Numbers > -1 (with a line under the greater than sign) 2. f(x)= 1-x^2 I got: Domain= All Real Numbers Range= All Real Numbers …
2. Algebra 2 Could use help asap

I really am trying to work these problems out on my own. Please help If f(x)=3x^2 g(x)= 1/6+x find the following and give the domain (f+g) (x) (3x^2) + (1/6+x) x is all real numbers and x is not equal to 6 (f-g) (x) (3x^2) - (1/6+x) …
3. math question

sheila made the following statement: the range of f(x) = ax + b is the set of all numbers given that a and b are real numbers. which produces a counter example to her statement?
4. math

Nancy made the following statement: The range of f(x) = ax + b is the set of all real numbers given that a and b are real numbers. Which produces a counter example to her statement?
5. math

Nancy made the following statement: The range of f(x) = ax + b is the set of all real numbers given that a and b are real numbers. Which produces a counter example to her statement?
6. math

The range of f(x) = ax + b is the set of all real numbers given that a and b are real numbers. Which produces a counter example to her statement?