Conversions
33 1/3% to a fraction
1/3
How would you get x by itself?
(2/3)x = 3/5 BONUS: solve for x.
Multiply both sides by 3/2.
x = 9/10
What is meant by an upside-down U in set notation?
"Intersection"
What two sets have in common.
xxxx-2y4y-3x0
xy
What is the probability of rolling an even number 3 times in a row?
(1/2)*(1/2)*(1/2)
=(1/8)
6.75% to a decimal
0.0675
What is the first step?
x + 0.2x = 6 BONUS: solve for x
Combine the x-terms:
1.2x = 6
Then divide by 1.2, so x = 5
A = {4, 5, 6} and B = {5, 6, 7}
Find AUB.
AUB = {4, 5, 6, 7}
"Union" means all elements of A and B.
4sqrt(2)*sqrt(10)
8sqrt(5)
How do you find the area of a parallelogram?
Area of a trapezoid?
Area of a parallelogram: b x h
Area of a trapezoid: (1/2)(b1+b2)h
2/3 to a %
66 2/3%
2x - 4 = 4 - 2x
x = 2
What is a prime number?
BONUS: name the first 3 prime numbers.
A number with exactly two factors.
2, 3, 5,......
a-4b2b-3a3ac-1c6
b-1c5
or c5/b
Below is a rule for a sequence. What is the 6th term?
an = 5(n + 1 )
Plug in 6 for "n"
a6 = 5(6 + 1)
a6 = 5(7)
= 35
How many pints are in 3 quarts?
6
(1 quart = 2 pints)
What are pairs of points that you could graph for this equation?
x - y = 2
(2, 0)
(0, -2)
(4, 2), etc.
What is a composite number?
BONUS: name the first 3 composite numbers.
A number with MORE than 2 factors.
4, 6, 8,.....
3sqrt(6)*8sqrt(21)
72sqrt(14)
What is the probability of drawing a black card from a deck of cards, keeping it, and drawing another black card?
(26/52)*(25/52)
or (1/2)*(25/52)
=25/104