1. Reagan’s Unit 3 Vocab
By: Reagan M

2. Algebraic expression An expression that uses a variable Examples X+3=6
K+9=40

3. Cell
In a columns and rows grid, where the columns and rows meet.

4. Columns
A column is where a section of cells go up and down a columns and rows grid

5. Rows
A rows is where a section of cells go across a columns and rows grid

6. Evaluate (a formula)
When you substitute a value for the variable, then perform a operation
3y + 2y when 5 = y.
1st step
3(5) + 2(5)
2nd step
3(5) + 2(5) = = 25
4X+6X when X= 6
4(6) +6(6) 2nd step 4(6) +6(6)= 24+36= 60

7. Formula
A general rule for finding the value of something, a formula is often written using letters, called variables that stand for quantities involved.
A=l*W A= area of a rectangle l= it’s length W= it’s width
W+X= W=4 X=5

8. General Pattern
A general pattern is when a number or operation does not change when the pattern changes. Variables are usually used to represent the numbers that do change
0*X=0 any number multiplied by 0 will always end up being 0
1*X=X any number multiplied by one will always end up being the number one was multiplied by.

9. Rate A comparison by division of two quantities with unlike units.
67 miles per hour is a rate that compares distance with time
2 pages a second compares time and quantities

10. Unit rate
A rate with the number one in it.

11. Special case An example of a general pattern.
2*2=4 is the special case for w*w=x
6*5=30 is the special case for y*h=30

12. Variable
A letter or symbol that represents a number, A variable can stand for one number or it can stand for many numbers
X*4=24 X=6
H*H*8=32 H=4

13. Square Root
The square root of a number n is a number that, when multiplied by itself, gives the number n.
4 is the square root of 16 because 4*4=16.
8 is the square root of 64 because 8*8=64.