Vocabulary
What does an equation have that an expression does not?
=
What value of x makes the number sentence true?
x + 4 = 12
x = 8
Four less than a number.
n - 4
Graph x < -3
See below.
I see a model of an equation on my test paper. What do I do first????
Look for the key.
What is a "variable"?
An unknown number, usually represented by a letter (x,y,a,b,c...)
What value of b makes the number sentence true?
-4b = -16
b = 4
The product of eight and a number is 24.
8n = 24
Flip the following inequality without changing its meaning.
18 > y
y < 18
I see the following equation on my paper. What do I do first?
x - 23 = 50
Draw the river!
How many terms are in the following equation?
8x + 9 + 3ab - 6y = 18 - 2x
6
What value of y makes the number sentence true?
y/9 = -5
y = -45
A number less than 30 is 13.
30 - n = 13
Give three numbers in the solution set of
x - 3 < 12
x < 15, so any three numbers less than 15 will work
The test question is a story problem. After I panic, I read the problem twice to be sure I understand. What do I do next????
Circle or underline the key words and numbers.
What are the coefficients in the equation?
-4x+15 = 4+8ab+y
-4, 8, 1
What value of y makes the number sentence true?
-8 + y = 15
y = 23
Bob earns $10 per sidewalk shoveled. Last weekend, he shoveled s sidewalks and earned a total of $160. What equation represents this situation?
10s=160
How do I know if I use an open circle or a closed circle?
If you take the time to draw the line, you have to take the time to fill in the circle.
I see the following equation on my paper. I have already drawn the river. What inverse operation do I need to do so that I can isolate the variable?
-5x = 25
Divide by -5.
What are all of the possible solutions of an inequality called?
A solution set.
What value of n makes the number sentence true?
1/4 n = 3
n = 12
The difference of a number and 3 is less than -12.
n - 3 < -12
What values of x would make the number sentence true?
x + 12 < -4
x < -16
I've done a story problem on my test. I'm pretty sure I've got the right answer, and I checked my work. What is my last step???
Does my answer make sense???