The Number System
True or false: Irrational numbers are numbers which cannot be written as a fraction
True
The greatest common monomial factor of 12x^2 and 8x^3 is...
The inequality 3x + 2 > x + 8 is equivalent to
x > 3
True or false: The graph of a circle is a function
False--fails VLT
In a class of 24 students, 25% of them failed a
test. How many students failed the test?
6
Whole numbers begin at...
0
Simplify:
x(3x + 5)
3x^2 + 5x
Solve for x: 0.4x + 3 = 15
x = 30
Is this a function?
{(0, 4), (1, 6), (8, 4), (9, 1)}
Yes--no x's repeat!
The sentence 3 + (5 + 2) = (5 + 2) + 3 illustrates what property?
The commutative property of addition
Integers are...
Positive and negative numbers, cannot be fractions
Find the sum of 5x^3 +3x^2 + 5 and
2x^3 + 6x^2 - 5.
7x^3 + 9x^2
Solve for x: 5(2x - 4) = 10
x = 3
If f(x) = 3x^2, find f(-2).
27
Simplify by combining like terms:
(5a + 3b) + 2(a - 3b)
7a - 3b
A rational number plus an irrational number is a(n)....
Irrational number
Simplify:
18x^8/9x^2
2x^6
Solve for x: 5x - 2(x + 1) = 10.
x = 4
If f(x) = (x + 1)^2, find f(3)
16
Factor: x^2 + 5x - 24
(x + 8)(x - 3)
Pi would best be described as a(n)...
Irrational number
(x + 5) (x + 4)
x^2 + 9x + 20
Solve for x: 5x + 7 = 2x - 2
x = -3
If f(x) = 5x - 1, find f(-1)
-6
Express the product (2x - 3)(x + 5) as a trinomial.
2x^2 + 7x - 15