Download Math 130B – Quiz 1

Math 130B – Quiz 1
Spring 2006
1.
Use the following set of numbers to give me an example; - 2, 3, ½, 0.02,
3 , and 0
a) a real number that is not rational: ____________
b) a whole number that is not a natural number: ___________
c) an integer that is not a whole number: ____________
d) a rational number that is not an integer: ________
2.Identify the property that is being used;
a + b = b + a → _________________________________
a + ( b + c ) = ( a + b ) + c → ________________________
3. Find
a) the smallest prime number: ____________
b) the smallest positive whole number: _______________
c) all real numbers that are not positive or negative: ________
4. What is the additive inverse of -2/3 ? ___________ What is the multiplicative identity ? ________
5. If you can walk 320 steps per 5 minutes, then how many steps will you walk in hour ? ___________
There are 2400 balls that are to be boxed. You put 40 ball per box. How many boxes will you need ?
6. Find
( - 21 ) • ( - 4 ) = ____________
( - 240 ) - ( - 40 ) = _____________
( - 2 ½ ) + ( - ¾ ) =_____________
8.
Use the rules of exponents to simplify.
a) 2x2 • 3x4 = __________
d)
4x
= ________
2x 2
b) - 4xy3 • 2x2y3 = _________
e)
4 xy
= _________
12 x 2
c) ( -4x4 ) 3 = ________
f)
 40 x
= ________
2x 2 y
Math 130B – Quiz 2
Spring 2006
1. Which of these is (are) not polynomial(s) ?
2x
-3
2x2y + 2
- ½ xy
x2 y
z
21/2 + x
2. What is the degree of each of the following
- 4x2 → _____________
2x + y → _____________
x2y5 + 28 → __________
3. A binomial has _____________ terms ( how many )
4. If a polynomial has three terms we call it a ___________________
5.
If a polynomial has two factors and one term then we call it a _________________
6.
Find the products
2x2 ( x + 2xy ) = ___________________
7.
( x – 2y ) ( x + y ) = _________________________
Use the order of operations to simplify
4 – 8 ÷ 2 = ______________
42 ÷ 16 – 4 + ( - 12 ) = ____________
3 – 2 [ 2 – ( 1 – 3 ) ] = ____________
8. Evaluate the following if x = -1 and y = 0
xy – x = ____________
- x2 + 4y = _____________
9. If the area for a circle is given by A = πr 2, find the area for a circle with diameter of 14 inches and π = 22/7. _________
10. GCF of 42 and 36. __________________
LCM of 12 and 16. _____________
Math 130B – Short Quiz #3
Jan. 31, 2006
1.
Which of these equations is a first degree equation ?
2 + x = 17
2.
3x2 – x – 5 = 0
x + 2y = 3
xy + x – 3 = 0
Is x = -2 a solution of
- x 2 – 4x = 12 ? Show Work
3. Find the solution of each of the following equations. SHOW WORK.
a) 2x = - ¼
b)
x x2

3
2
x = __________
c) 2 – 3( x – 4 ) = - 3
x = __________
d) 0.12x = 3.6
x = __________
e) 1 – 2 [ 3 – 2 ( 3 – x ) ] = 4
x = __________
f) 2x -
x = __________
g)
3
1
1
x x
4
3
2
x = __________
3
7
=
5
3
x = __________
h)
x ( 1 – 2x ) = 2x ( x + 1 ) + 4
x = __________
Math 130B – Short Quiz #4
Feb. 2, 2006
1. True or False
a) - 4 > 2
c)
2.
- 12 ≥ -12
b)
d) If x is a whole number, then –x < x
2.5 ≤ 5/2
Graph on a number line
b) x ≥
a) x < - 2.4
2
3. Is x = - 2 a solution to the following inequality ?
2–3(x+2)> 4
4. Find the solution to each of the following inequalities.
a) 4 – 2x > - 2
c) 2x – 3 < 2 + 3 ( x – 2 )
e) x - 2/3 ≥ 4x + 5/6
b)
3
x5
4
d)
3
3
( x  1 / 4) 
5
10
Math 130B – Short Quiz #5
Feb. 7, 2006
1. Find each of the following absolute values
| x2 | = _______________
| - 2 /7 | = ____________
if x is a whole number, find | 1 – 3x | = ____________________
2. List all the values of x so that | x | = - 2 _________________
List all the values of x so that | x + 3 | = 0 _______________
For what integer values of x will | 2x | = 12 ? ______________
3.
4.
Which one has the largest absolute value a or c ? assume that graph clearly indicated their location on the number line.
|
|
|
b
0
a
Is x = -2 a solution of | x2 – 2x | = 8 ? _____________
5. Does an absolute value always have to be positive ? _________________