Adding and Subtracting Integers
-8 + (-5) =
-13
4b + 3 = -9
b = -3
What is the answer to a multiplication problem called?
Its product.
2.5 + - 3.2 =
-0.7
In 1990 a person is 15 years old. In 1995 this same person is 10 years old.
How can that be?
The person was born in 2005 B.C. (Before Christ). Therefore, he was 5 years old in 2000 B.C, 10 in 1995 B.C, and 15 in 1990 B.C.
-31 + 31 =
0
2t + 8 = -10
t = -9
Probability that is based on repeated trials of an experiment is called?
Experimental probability
-4 1/7 - 5/7 =
-4 6/7
An apple is 40 cents, a banana is 60 cents, and a grapefruit is 80 cents. How much is a pear?
40 cents. The price of each fruit is calculated by multiplying the number of vowels by 20c.
The elevation of a fish is -27 feet. The fish descends 32 feet and then rises 14 feet. What is the new elevation?
-45 ft
10.35 + 2.3h = -9.2
h = -8.5
The set of all possible outcomes of one or more events is called the????
Sample Space
1 5/8
When my father was 31, I was 8. Now he is twice as old as me. How old am I?
I must be 23 if my father is twice as old as me.
The sum of two negative integers is always negative.
True or False
True; same sign; keep the sign and add
7.3y -5.18 = -51.9
y = -6.4
What consists of two or more events?
Compound Event
-2/9 divided by 2 2/5
- 5/54
Use the numbers 2, 3, 4, 5 and the symbols + and =
to make a true equation.
2 + 5 = 3 + 4
[13 + (-28)] - 13 =
-28
-2/3 (x + 3/5) = 1/2
x = - 1 7/20
An experiment that is designed to reproduce the conditions of a situation or process is called?
Simulation
-1 2/3 x (-3/5) divided by (1/3)^2
9
You have 14 Brown socks, 14 Blue socks, and 14 Black socks in your sock drawer. How many socks must your remove (without looking to be sure) to have a matched pair?