Pre Algebraic Equations

Select the solution for the following equation:

−15 = −4m + 5

• m=-5

• m=5

• m=-16

• m=-14

Select the solution for the following equation:

32>-16p

• p<-2

• p>-2

• p>48

• p>16

Select the definition that best fits the following vocabulary word:

Combining Like Terms

• Used to simplify expressions by 

  multiplying a single term by two or more 

  terms inside parentheses.

• Solve for the variable (unknown).

• Used to tell us the relative size of two 

  values.

• Mathematical process used to simplify an

  expression. You add or subtract terms 

  whose variables are the same.

Select the graph that best matches with the following inequality:

b-7<-12

• 
• 
• 
• 

Jill wants to buy magnets which cost R5 each. If y is her total cost, and x is the number of magnets which she can buy, then

• (a) x = 5y

• (b) y=5x

• (c) 5y=5x

You are given the following equation: y = 200x + 80. You are also told that this formula represents the following situation: Peter has to pay R80 deposit to rent a popcorn machine, as well as R200 per day. If he pays the deposit and decides NOT to take the popcorn machine, he will NOT get the deposit back. What is the constant in the equation? (In other words, even if the number of days he rents the machine is “0”, what does he still have to pay?)

• (a) R200

• (b) R80

• (c) y

In the above question, what is the coefficient of x?

• 80

• 200

• y

In the above example, what does the coefficient of x represent?

• The total amount that he has to pay.

• The daily rate of renting the popcorn machine.

• The amount of the deposit.

Solve the following algebraic expression, if x = 10, what is the value of y?

y = 7x + 8

• y = 70

• y = 78

• y = 10

Is the following true or false: If 2a = 2, then a = 2.

• (a) True.

• (b) False.