What are whole numbers? And give examples.
1,2,3
x^o = ?
x^o = 1
What is 40% as a fraction and decimal?
40% = 40/100 (or 4/10=2/5)
40% = .4
ALL - Factor Table
Is zero a whole number?
Yes
2^(3x) = 2^6
What is x?
3x=6
x=2
What percent is 2/5?
2/5=4/10= 40/100
40%
What are the prime factors of 32
32
2 16
2 8
2 4
2 2
What are integers? And give examples
Whole numbers + negative whole numbers (-1,0,1)
38x/32 = ?
38x-2
What is cross multiplying?
When a fraction equals a fraction:
20/100 = 3/x
You multiply both sides by 100 and both sides by x:
20x = 3(100)
How do I find the multiples of 7?
7: 7, 14, 21, 28, ...
What are rational numbers? And give examples
1/3, .5, -.8798
x3/4 = ?
3√x4
If you buy a shirt that is $40, and it has a 15% sales tax. How much do set up this problem with decimals?
40(1.15)
4: 4, 8, 12, 16, 20, 24
5: 5, 15, 20, 25
What are irrational numbers? And give examples
decimals that are non-terminating and non-repeating (they go on forever without a pattern)
π, √2
82x = 23
How do we change 82x to have a base of 2?
82x = (23)2x = 26x
So now 26x = 23
You have a bag of 12 marbles. You know that 25% of the marbles are red.
How do you set up fractions to CROSS MULTIPLY to find HOW MANY MARBLES ARE RED?
25/100 = x/12
How many odd factors does 60 have?
60
1,60
2,30
3,20
4,15
5,12
6,10