Algebra Review (Pythagorean Theorem, Solve Equations, Radicals)

-48 = -6a

• a = -8
• a = 8
• a = 42
• a = -42

Tags

CCSS.6.EE.B.7

-3(4x - 10) = 42

• x = 0
• x = 1
• x = -1
• no solution

Tags

CCSS.7.EE.B.4A

12 = 2c - 4

• c = 8
• c = -8
• c = 4
• c = -4

Tags

CCSS.7.EE.B.4A

d + 5 = 10

• d = -5
• d = 5
• d = 0
• no solution

Tags

CCSS.6.EE.B.7

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

• They should have divided by 1 for the last step
• They should add 19 instead of subtracting 19
• I can not find an error
• Instead of adding 3k they should subtract 3k

Tags

CCSS.HSA.REI.A.1

The steps in solving 5b - 6 = 24 are: 

• Add 6 to both sides and divide both sides by 5
• Add 6 to both sides and multiply both sides by 5
• Subtract 6 from both sides then multiply both sides by 5
• Subtract 6 from both sides then divide both sides by 5

Tags

CCSS.7.EE.B.4A

What is the first step to solve this equation:
-11 - 3x = 44

• Add 3 to both sides
• Subtract 11 from both sides
• Add 11 to both sides
• Divide 3 on both sides.

Tags

CCSS.7.EE.B.4A

Solve for x.

• x = 21
• x = 7
• x = −21
• x = 4

Tags

CCSS.6.EE.B.7

Simplify the expression: 2x + 1 + 7x 

• 10x
• 10
• 9x + 1
• 9 + 1x

Tags

CCSS.7.EE.A.1

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

Tags

CCSS.7.EE.A.1