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Lesson 2.7 HW quiz

Authored by Erina Stanley

Mathematics

9th Grade

CCSS covered

Used 67+ times

Lesson 2.7 HW quiz
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Mai says that equations A and B have the same solution.
Equation A:   3(x+7)=24-3\left(x+7\right)=24   
Equation B:  x+7=8x+7=-8  

 Which statement explains why this is true?

Adding 3 to both sides of Equation A gives   x+7=8x+7=-8  

Applying the distributive property to Equation A gives  . x+7=8x+7=-8  

Subtracting 3 from both sides of Equation A gives   x+7=8x+7=-8  

Dividing both sides of Equation A by -3 gives   x+7=8x+7=-8  

Tags

CCSS.HSA.REI.A.1

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is 0 a solution to  2x+10=4x+102x+10=4x+10  ? Explain or show your reasoning.


It is a solution because  20+10=102\cdot0+10=10  and  40+10=104\cdot0+10=10  .

It is not a solution because  20+10=122\cdot0+10=12   and  40+10=144\cdot0+10=14   .

It is a solution because solution is x=10 

Tags

CCSS.6.EE.B.5

3.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

 Kiran says that a solution to the equation 
 x+4=20x+4=20  
 must also be a solution to the equation 
 5x+20=1005x+20=100  
Select all explanation as to why this is true.

The two equations are equivalent. Multiplying the first  by 5 gives us the second equation . 

Multiplying both sides of an equation  x+4=20x+4=20   by  5 keeps the two sides equal,  and creates the second equation

the value of  x that is a solution to the first equation is still a solution to the second equation.

Tags

CCSS.8.EE.C.7A

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The entrepreneurship club is ordering potted plants for all 36 of its sponsors. One store charges $8.50 for each plant plus a delivery fee of $20. The equation  360=x+7.5036360=x+7.50\cdot36  
 represents the cost of ordering potted plants at a second store.
What does the x represent in this situation?

The cost for each potted plant at the second store

The delivery fee at the second store

The total cost of ordering potted plants at the second store

The number of sponsors of the entrepreneurship club

Tags

CCSS.7.EE.B.4A

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 5x+30=455x+30=45  Which equation is equivalent to the equation ?


 35x=4535x=45  

 5x=755x=75  

 5(x+30)=455\left(x+30\right)=45  

 5(x+6)=455\left(x+6\right)=45  

Tags

CCSS.8.EE.C.7A

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The environmental science club is printing T-shirts for its 15 members. The printing company charges a certain amount for each shirt plus a setup fee of $20.

If the T-shirt order costs a total of $162.50, how much does the company charge for each shirt?

$9.50

$10.00

$10.50

$9.00

Tags

CCSS.7.EE.B.4A

7.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Select all the equations that have the same solution as . 2x5=152x-5=15  


 2x=102x=10  

 2x=202x=20  

 2x20=02x-20=0  

 4x10=304x-10=30  

 15=52x15=5-2x  

Tags

CCSS.8.EE.C.7A

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