If 2^3x=8 , then x=
A. 2/3
B. 1
C. 3/2
D. 4
E. 8/3
B. 1
100
2.If 33mn+10=38mn, then what is the value of mn?
A. -1/2
B. 0
C. 1/2
D. 2/3
E. 2
E. 2
100
If a positive number n increased by r times that number equals that number, then what is the value of r?
A. -2
B. -1
C. 0
D. 1
E. 2
C. 0
100
If f(x)= x^2+3x+2, then what is the value of f(3)?
A. -2
B. -1
C. 7
D. 20
E. 38
B. -1
100
If 1/x+1/7=7/x, then what is the value of x?
42
200
If a=0 and b not=0, then what is the value of a/b+a+1/b+a-1/b?
A.3
B.2
C.1
D.2/3
E.2
E. 2
200
4.If a-b=80 and 3/5=b/a, then what is the value of a?
A.-1
B.0
C.1/2
D. 1
E. 3
B.0
200
If it takes 10 men 4 hours to repait a barn, how long will t take 8 men to complete the task?
A. 2 hours
B. 5 hours.
C. 6 hours.
D. 8 hours
E. 10 hours
B. 5 hours
200
If f(x)=x+2^x, what is the value of f(-2)?
A. -9/4
B. -7/4
C. 7/4
D. 9/4
E. 6
B. -7/4
200
If x+y=-3 and x-y=5, then what is the value of -xy?
4
300
If a=-2 and b=16, then a^0 b^1/2 + a^-2 b^-1/2 is equal to
A/ -3/16
B. 1/32
C. 1/16
D. 65/16
E. 257/32
D. 65/16
300
11. If x+y=1 and x-y=25, then what id the value of 2x^2-y^2?
A. 425
B. 775
C. 825
D. 1,575
E. 1,625
B. 775
300
If x years from now, Robert will be k years old. How old wa Robert m years ago?
A. x-(k+m)
B. k-x
C. k-x-m
D. x-(k-m)
E. k+m-x
C. k-x-m
300
What is the value of f(x)=3^x+3x+3^0 is x=3?
A. 5
B. 16
C. 38
D. 49
E. 93
D. 49
300
I a+2a+3a+4=a+2a+5, then what is the value of a?
0
400
If m>0, then (-m)^5(-m)^4=
A. -m^54
B. -m^20
C. -m^9
D. m^9
E. m^20
C. -m^9
400
5.If onions cost r cents, how many onions cab be bought with d dollars?
A. 100d/xr
B. r/100dx
C. 100r
D. 100dx/r
E. dx/100r
D. 100dx/r
400
If the square of a number N (N not=0) equals g times that number, then what is that number in terms of g?
A. -g2
B. -g
C. g
D. 2g
E.g2
C. g
400
If f(x)=x^2 - 9/x^2-4, the domain of x is all real numbers except
A. -2 and 2
B. -3 and 3
C. 0
D. 2
E. 2 and 3
A. -2 and 2
400
If x/2y=3, then what is the value of x^2-36y^2?
0
500
If 1
E. 15/56
500
If square root 2x + 7 =13, then the value of x equals
A. 3/2
B. 3
C. 10
D. 18
E. 200
D. 18
500
A trip to Europe for a class of N students has a fixed cost of x dollars. If 5 students decide not to go, then how much more will it cost each student to take the trip?
A. x/5
B. x/N-5
C. x/n - x/5
D. x/N - x/N-5
E. x/N-5 - x/N
E. x/N-5 - x/N
500
if f(x)=x^2/4 + 4x^-2 + x^0, then what is the value of f(4)?
A. -7/1/2
B. 0
C. 1
D. 5/1/4
E. 8/1/2
D. 5/1/4
500
if the average of a number N and its reciprocal is 1, what is the number N?