Basic Algebra

Basics of Algebra

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What is an expression?

Multiple Select

Which expression you can use to represent the difference of a number n and 3?

• n - 3

• 3 - n

• 3n

• 3n - 3

Multiple Choice

Evaluate (calculate result of) the expression

$$n\div4$$  when n=20

• 20

• 4

• 5

• 12

What is an equation?

Multiple Choice

Write the equation: a number n increased by 7 is 12.

• 7n = 12

• n + 7 = 12

• 7n = 12n

• n - 12 = 7

Multiple Choice

Two weeks ago the average temperature in Michigan was

$$-10\degree C$$  and last week the average temperature in Michigan was  $$-8\degree C$$  . What is the difference of the temperatures?

• 2

• 8

• 10

Multiple Choice

$$3x+10$$  

Which one is the variable?

• 3

• x

• +

• 10

Multiple Choice

$$3x+10$$  

What is the coefficient?

• 3

• x

• +

• 10

Multiple Choice

$$3x+10$$  

What is the constant?

• 3

• x

• +

• 10

Multiple Choice

$$3x+10$$  

How many terms are there?

• 1

• 2

• 3

• 10

Multiple Choice

What is the algebraic expression for                  "the sum of n and 9"?

• n - 9

• n + 9

• n/9

• 9n

Multiple Choice

Simplify

a + a = ?

• a²

• a¹

• 2a

• aa

Multiple Choice

Simplify

2b + b

• 3b

• b³

• b

• 2b

Multiple Choice

Simplify 4m + 3 + 2m - 2.

• 6m - 1

• 11m

• 6m + 1

• 6m + 5

Multiple Choice

take 10 away from s 

• 10 - s 

• s + 10

• s - 10

• s/10

Multiple Choice

six times the number of girls
Let g = number of girls

• 6 + g

• 6g

• g - 6

Multiple Choice

Use the distributive property to write an equivalent expression for 3(x+2)

• 3x + 2

• 2x + 3

• 3x + 6

• 2x + 6

Multiple Choice

Write an expression

• 5x + 3

• 5x + 15

• 10x + 3

• 10x + 15

Multiple Choice

Write an equation and identify the answer for the following problem.

I am 38 years old. My sister's age plus five is equal to my age. How old is my sister?

• s + 38 = 5

  -38 -38

  s = -33

• 38 + 5 = 42

• s + 5 = 38

  -5 -5

  s = 33