Download Lesson 2 - Coweta County Schools

Notes Over 2.2
Find the opposite of the number. Then find its absolute value.
Opposite - two numbers that are the same distance from
the origin but on opposite sides.
Absolute value - distance from the origin
1.  17
.
2. 4.2
3.  5
Opposite:
Opposite:
Opposite:
17
.
4.2
5
Absolute Value:
Absolute Value:
Absolute Value:
17
.
4.2
5
Notes Over 2.2
Use mental math to solve the equation. If there is no solution,
write no solution.
4. x  18
.
5. x  14
.
18
. , 18
6. x  113
.
.
113
. , 113
Notes Over 2.1
Find the speed and the velocity of the object.
Speed - positive form of the rate.
Velocity - indicates speed and direction,
be positive or negative.
9. A duck hawk descends
at 150 miles per hour
when striking its prey.
Speed:
150 mph
Velocity:
150 mph
can
Notes Over 2.1
Find the speed and the velocity of the object.
Speed - positive form of the rate.
Velocity - indicates speed and direction,
be positive or negative.
10. A helicopter descends
at 8 feet per second.
Speed:
8 ft per sec
Velocity:
8 ft per sec
can
Notes Over 2.2
Determine whether the statement is true or false. If it is false,
give a counterexample.
9. The sum of a number and its opposite is always 0.
10. The product of a number and its opposite is
always negative.
00  0
11. The absolute value of a negative fraction is
always greater than 1.
1
1

6

6
1
Notes Over 2.1