I've got a huge test coming up and I'm horrible at math 
if anyone can please help me I would appreciate it so much. I have 13 problems left that I need help with off my exam review sheet. I've been working on this for hours! Please don't think I'm cheating this 100 question review and I'm SO confused on these. I'm not just going to take the answers. and I'm going to study and figure it out on my own I just need some help, please!
EVEN IF YOU ONLY HELP WITH ONE IT STILL HELPS ME!
0. A charter bus service from Chicago to New York charges $500 plus $20 for each person beyond the first 30. Then the total charge c(x) for a group consisting of x people is given by the following function: c(x) = ________ if x "is greater then" 30
1. The kinetic energy k of a moving particle acted on by various forces on quadratically on the velocity x of the particle. The particles energy is 155 ergs when its velocity is 5 m/sec, 805 ergs at 10 m/sec and 1955 ergs at 25 m/sec. write the quadratic function which fits these data
k(x)=______________?
A) 155x^2+805x+1955
B) 10x^2+20x-195
C) 50x^2-1020x+4005
D) 10x^2-20x+5
clueless here!
2. Which of these intervals contains all the negative numbers greater then -10?
A) (-10,3)
B) (-10, "sideways 8")
C) (-10,1)
D) None of the above
I should probably know this, huh? I'm probably over thinking it. Are those coordinates on a graph and after plotted I would see if they're under -10?
3. Mark every expression which appears as a factor in the complete factorization of:
9x^2 - 25?
A) 9x+5
B) 3x+1
C) 9x+1
D) 3x-25
E) 3x+5
F) x-25
G) 3x-25
H) x-5
again, LOST!
4. If lines and L and L'2 are perpendicular, and L, and has slope 3, what is the slope of L'2?
5. Given that (-5,6) is given on the graph of y=f(x), which of the following points is certain to be on the graph of y= (1/6x)?
A) (-1,5/6)
B) (-1,5)
C) (-36, 30)
D) (-36, 5)
6. Express [-9, -3] as a set using absolute value and an inequality
A) {x[1x+6] "less then or equal to" 3}
B) {x[1x-6] "less then or equal to" 3}
C) {x[1x-3] "less then or equal to" 6}
D) None of the above
7. All one-to-one functions of the set of real numbers onto itself have an inverse
A) False
B) True
8.The electrical resistance of a wire varies directly with its length and inversely with the square of its radius. If a wire with a radius of .9 millimeter and length of 20 meters has a resistance of 18 ohms what will be the resistance of a wire with a radius of .4mm and length of 10 meters: ______Ohms?
9. 93/2 * 81/3 = _________?
10. Let f be defined by: f(x) square root of x^2+3
Does f define a function from the real numbers to the real numbers
A) Yes
B) No
11. Solve this equation: 3a-(a-7)=15
a=_____?
12. Mark every expression which appears as a factor in the complete factorization of: 4x^2-25
A) 2x+1
B) 4x+5
C) 2x-25
D) x-5
E) 2x-5
F) x-25
G) 4x+1
H) 2x+5
13. -7 - i/-4 - i =
A) 29/17 - 3/17 i
B) 7/11 - 4/11 i
C) 5/14 - 3/14 i
D) 31/28 - 5/28 i
14. f(x) = 2x+7, the inverse of f(x) if g(x)=
A) 2(x=7)
B) x-2/7
C) 7(x+2)
D) x-7/2
if anyone can please help me I would appreciate it so much. I have 13 problems left that I need help with off my exam review sheet. I've been working on this for hours! Please don't think I'm cheating this 100 question review and I'm SO confused on these. I'm not just going to take the answers. and I'm going to study and figure it out on my own I just need some help, please!EVEN IF YOU ONLY HELP WITH ONE IT STILL HELPS ME!
0. A charter bus service from Chicago to New York charges $500 plus $20 for each person beyond the first 30. Then the total charge c(x) for a group consisting of x people is given by the following function: c(x) = ________ if x "is greater then" 30
1. The kinetic energy k of a moving particle acted on by various forces on quadratically on the velocity x of the particle. The particles energy is 155 ergs when its velocity is 5 m/sec, 805 ergs at 10 m/sec and 1955 ergs at 25 m/sec. write the quadratic function which fits these data
k(x)=______________?
A) 155x^2+805x+1955
B) 10x^2+20x-195
C) 50x^2-1020x+4005
D) 10x^2-20x+5
clueless here!
2. Which of these intervals contains all the negative numbers greater then -10?
A) (-10,3)
B) (-10, "sideways 8")
C) (-10,1)
D) None of the above
I should probably know this, huh? I'm probably over thinking it. Are those coordinates on a graph and after plotted I would see if they're under -10?
3. Mark every expression which appears as a factor in the complete factorization of:
9x^2 - 25?
A) 9x+5
B) 3x+1
C) 9x+1
D) 3x-25
E) 3x+5
F) x-25
G) 3x-25
H) x-5
again, LOST!
4. If lines and L and L'2 are perpendicular, and L, and has slope 3, what is the slope of L'2?
5. Given that (-5,6) is given on the graph of y=f(x), which of the following points is certain to be on the graph of y= (1/6x)?
A) (-1,5/6)
B) (-1,5)
C) (-36, 30)
D) (-36, 5)
6. Express [-9, -3] as a set using absolute value and an inequality
A) {x[1x+6] "less then or equal to" 3}
B) {x[1x-6] "less then or equal to" 3}
C) {x[1x-3] "less then or equal to" 6}
D) None of the above
7. All one-to-one functions of the set of real numbers onto itself have an inverse
A) False
B) True
8.The electrical resistance of a wire varies directly with its length and inversely with the square of its radius. If a wire with a radius of .9 millimeter and length of 20 meters has a resistance of 18 ohms what will be the resistance of a wire with a radius of .4mm and length of 10 meters: ______Ohms?
9. 93/2 * 81/3 = _________?
10. Let f be defined by: f(x) square root of x^2+3
Does f define a function from the real numbers to the real numbers
A) Yes
B) No
11. Solve this equation: 3a-(a-7)=15
a=_____?
12. Mark every expression which appears as a factor in the complete factorization of: 4x^2-25
A) 2x+1
B) 4x+5
C) 2x-25
D) x-5
E) 2x-5
F) x-25
G) 4x+1
H) 2x+5
13. -7 - i/-4 - i =
A) 29/17 - 3/17 i
B) 7/11 - 4/11 i
C) 5/14 - 3/14 i
D) 31/28 - 5/28 i
14. f(x) = 2x+7, the inverse of f(x) if g(x)=
A) 2(x=7)
B) x-2/7
C) 7(x+2)
D) x-7/2
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