What is -2 + 2?
0
Solve for x.
x + 1 = 8
x = 7
What type of angle is greater than 90 degrees?
obtuse angle
Complete the chart below.
positive x positive =
positive x negative =
negative x positive =
negative x negative =
positive x positive = positive
positive x negative = negative
negative x positive = negative
negative x negative = positive
What is -4 x -3?
12
Solve for x.
-2x = 10
x = -5
What type of angle is shown below?
complementary
Label each part of the equation below using the vocabulary words: constant, coefficient, variable, and term.
4x + 6 = 11
4 - coefficient
x - variable
6 - constant
4x - term
What is -6 + 5 - (-2)?
1
What is the first step to solve for x in the equation below?
3((x+1)/7 +4 - 2x)=21
Divide 3 on both sides of the equation.
Draw an example of supplementary angles.
Answers will vary.
Sing the song that we learned to remember how to add and subtract integers.
(You are allowed to have your notes out, but you only have 15 seconds to find them)
Same signs, add and keep
Different signs, subtract
Keep the sign of the bigger number
Then you'll be exact!
The average temperature in Fox Lake during summer is 78° F. The average temperature in Fox Lake during winter is 80 degrees colder than summer. What is the average temperature of winter in Fox Lake?
(signs and labels are important!)
-2° F
Solve for x.
5x - 9 = -29
x = -4
How many degrees does x represent in the diagram below?
85°
Describe the difference between an equation and an expression.
An equation contains two expressions set equal to each other.
An expression contains numbers, operators, and/or variables, but has no equal sign.
A submarine starts at sea level and descends 12 feet per minute. What level is the submarine at once 5 minutes has passed if it continues down at the same rate?
Write answer in a complete sentence.
The submarine will be -60 feet below sea level.
Solve for x.
4(3x+1)-7=9
x = 1
Find the measure of every angle shown in the diagram below.
∠EDS= ∠CDA=
∠EDG= ∠CDR=
∠EDR= ∠CDG=
∠EDA= ∠CDS=
∠EDS= 25°
∠EDG= 50°
∠EDR= 105°
∠EDA= 140°
∠CDA= 40°
∠CDR= 75°
∠CDG= 130°
∠CDS= 155°
Using what you know about angle measures and solving equations, solve for x in the diagram below.
x = 12