SG 1.11: Unit 1 Review

Solve for x : 

 $\frac{x-1}{2}\ -\ \frac{2\ -\ x}{3}\ =\ 8$  

• 14

• 11

• 48

• 88

Tags

CCSS.8.EE.C.7B

Emmanuel solved the equation as pictured:

Which property justifies the word he did between line 1 and line 2?

• Distributive property

• Commutative property

• Subtraction property of equality

• Multiplication property of equality

Tags

CCSS.HSA.REI.A.1

Solve for k:

• 1/7

• 47/36

• 7

• 23

Tags

CCSS.7.EE.B.4A

The formula for velocity is given below. Which expression represents the formula rearranged for a?

 $v_f=v_i+at$  

•  $a=t\left(v_f-v_i\right)$  

•  $a=\frac{v_f}{t}-v_i$  

•  $a=v_f-v_i-t$  

•  $a=\frac{v_f-v_i}{t}$  

Tags

CCSS.HSA.CED.A.4

Solve for x.

 $4\left(3x-5\right)=5x-\left(x+12\right)$  

Tags

CCSS.8.EE.C.7B

Solve for r.

 $A=\pi r^2$  

•  $r=\frac{A}{\pi}$  

•  $r=\frac{\sqrt{A}}{\pi}$  

•  $r=\sqrt{\frac{A}{\pi}}$  

•  $r=\sqrt{A-\pi}$  

Tags

CCSS.HSA.CED.A.4

Find the error in the problem below

19 - 2k = 3k - 1

+3k +3k

19 + 1k = -1

-19 -19

Answer: 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

Solve for r:

V = πr²h

• 
  

  $\sqrt{\frac{v}{\pi h}}=r$

• $v\ -\pi\ -h\ =\ r$

• $\sqrt{\frac{\pi}{vh}}\ =r$

• V/πh = r

Tags

CCSS.HSA.CED.A.4

Solve for r:

C = 2πr

• C/(2π) = r

• C + 2π = r

• C - 2π = r

• 2πC = r

Tags

CCSS.HSA.CED.A.4

8v - 4(v + 8) = 8

• 2

• 10

• 4

• -4

Tags

CCSS.8.EE.C.7B