Lesson 16 Practice

You bought a magazine for $5 and four erasers. You spent a total of $25. How much did each eraser cost?  (Define 'n' and write the equation.) 

• n=total cost of erasers; 5 + 4n = 25
• n=cost of 1 eraser; 5 - 4n = 25
• n=cost of 1 eraser; 5n + 4 = 25
• n=cost of 1 eraser; 5 + 4n = 25

Tags

CCSS.HSA.CED.A.3

 $4b+8b-10=14$  

• 12

• 1

• -1

• 2

Tags

CCSS.8.EE.C.7B

Choose the correct mathematical equation to represent the following sentence:

Two less than seven times a number is equal to negative 10

• 2 − 7n = −10

• 2 + 7n = -10

• 7n − 2 = −10

• 7n + 2 = -10

$21=3+4n+5n$

• 9

• $-7$

• 6

• 2

Tags

CCSS.8.EE.C.7B

WRITE AN EQUATION
April had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?

• n=total cost pencils; 7n+10=24
• n=cost of 1 pencil; 7n-10=24
• n=cost of 1 pencil; 7n+10=24
• n=cost of 1 pencil; -7n-10=24

Tags

CCSS.HSA.CED.A.3

 $-2x+5+4x=25$  

• 4

• 7

• 6

• 10

Tags

CCSS.8.EE.C.7B

Which equation matches the following situation? 331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus?

• n= # of students in each bus; 6n + 7 =331
• n=# of buses; 6n + 7 =331
• n= # of students in each bus; 6 + 7n =331
• n= # of students in each bus; 6n - 7 =331

Tags

CCSS.HSA.CED.A.3

3(x+1)=9

• 2
• 8/3
• 5
• 4

Tags

CCSS.7.EE.B.4A

Scott works on cars. He charges $35 for each car plus $7 per hour. Write an equation that represents this scenario if Kylie's car bill was $63.

• 7x + 35 = 63
• 7x = 63
• 7x - 35 = 63
• 35x + 7 = 63

Tags

CCSS.HSA.CED.A.3

2(3x+6)=24

• 9
• 2
• 1
• 3

Tags

CCSS.7.EE.B.4A