Algebra Variable

Simplify the expression:
2(7 + 5y) - 2

• 12 + 10y

• 14 + 3y

• 12 - 3y

• 16 + 10y

Solve for the missing variable:
3 + 5m = 43

• m = 8

• m = 9

• m = 12

• m = 43

Solve for the missing variable:
-8 - 4k = -40

• k = 8

• k = -12

• k = 16

• k = 4

Simplify the expression:
7(n-3)

• 7n + 21

• 7n - 21

• 7n - 7

• n - 21

A letter that represents a number is a(n)​ (a)   .

• variable

• bse

• base

• exponent

• expression

• equation

A symbol for a number we don't know yet. This is usually a letter. (a)  

• coefficient

• sum

• variable

• term

A letter that shows the part we don't know is:

• Term 

• Constant 

• NONE

• Variable 

What is a variable?

• A letter than stands for an unknown number

• Something that changes

• A plus or minus sign

• A multiplication or division sign

Simplify the expression:
8(3v + 5)

• 24v - 40

• 32v + 40

• 24v + 40

• 24 + 40

Simplify the expression: 
12(x+y)

• 24xy

• 12x - 12y

• 12x + y

• 12x + 12y