All about Functions

A student solved this problem. Which, if any, describe the mistake(s) made?

• He distributed incorrectly on step 1. 6(x + 2) = 6x + 8

• He added 3x twice to the left side and added nothing to the right side. He made the scale unbalanced.

• On step 4, he should have added 12 to get rid of an added 12.

• There are no mistakes

A student solved this problem. What mistakes, if any, were made?

• On step 1, he added 4 to both sides. You cannot add the same number to both sides of an equation.

• On step 2, he moved the = sign. He should have 5m + 10 = 0 instead of 5m = 10.

• On step 3, he divided both sides by 5. He should have divided both sides by 5.

• There are no mistakes.

A student solved this problem. Find any mistakes if there are any.

• On step 2, the student eliminated the m's when they don't eliminate. -2m - 2m does not equal 0.

• On step 3, the student added 1 to get rid of the subtracted 1. He should have subtracted 1.

• On step 4, the student added 6 and 1 incorrectly.

• There are no mistakes in this problem.

What is the first step in solving this equation:
5x + 7 = 12

• Divide by 5
• Subtract 5
• Multiply by 7
• Subtract 7

The objective when solving an equation is to....

• isolate the variable.
• check the solution.
• guess and check.
• Combine Like Terms.

What operation would you perform first and then second when solving for m in the following equation?
10 + 7m = 17

• subtract 10, divide by 7
• divide by 7, subtract 10
• multiply by 7, add 10
• add 10, multiply by 7

Sophie has $14 and plans to save $5 each week until she has the $64 she needs for a new jacket.  How many weeks will it take Sophie to save money for a new jacket?

Type just the #

Mathematical Equivalence

ON

Solve the equation:
3(x - 1) = 2x + 9

Type just the #

Mathematical Equivalence

ON

Which set of values is a function?

• (1,5) (2,5) (1,-5) (2,-5)

• (3,10) (5,-3) (7,4) (3, 8)

• (6,1) (7, 2) (8, 2) (9, 1)

• (1, -2) (5, 8) (5, -7) (3, 4)

Is this table a function or not a function? 

• Function
• Not a Function