Math Equations and Inequalities Review

Find the error in the problem below:
19 - 2k = 3(k - 1)
19 - 2k = 3k - 1     
+3k   +3k
19 + 1k = -1
-19           -19
k = -20

• Incorrect application of the division property of equality.

• Incorrect application of the subtraction property of equality.

• I cannot find an error.

• Incorrect application of the distributive property.

Tags

CCSS.HSA.REI.A.1

Given: 3(x+1) + 5 = 2x - 1 Step 1: 3x + 3 + 5 = 2x - 1 Step 2: 3x + 8 = 2x - 1 Step 3: 3x + 8 - 2x = - 1 Step 4: x + 8 = - 1 Step 5: Which of the properties justifies step 5?

• The distributive property

• The associative property

• The subtraction property of equality

• Combining like terms.

4(2a + 3) < 3a + 2

• a < -2

• a > 2

• a < 2

• a > -2

• A

• B

• C

• D

Tags

CCSS.7.EE.B.4B

• 0
• 4
• 2
• 3

Tags

CCSS.7.EE.B.4B

Solve for a

• a= -2

• a= -6

• a= 3

• a= 15

Tags

2step

• A
• B
• C
• D

Tags

CCSS.6.EE.B.8

• A

• B

• C

• D

• A

• B

• C

• D

Tags

CCSS.6.EE.B.8

• A

• B

• C

• D