Grade 8 review -#1

Which graph represents a linear function of x?

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At a factory, the cost of making different numbers of toothbrushes is shown in the table above. A linear function models the cost based on the number of toothbrushes made.

Which statement about the rate of change of this function is true?

• The cost increases by $1.50 for each additional toothbrush made.

• The cost increases by $4.50 for each additional toothbrush made.

• The cost increases by $9.00 for each additional 3 toothbrushes made.

• The cost increases by $18.00 for each additional 3 toothbrushes made.

Triangle A and triangle B are graphed on the coordinate plane. Which sequence of transformations will map triangle A onto its congruent image, triangle B ?

• a reflection over the x-axis, then a reflection over the y-axis

• a translation 8 units down, then a reflection over the y-axis

• a reflection over the x-axis, then a translation 6 units to the left

• a rotation 90 degrees clockwise about the origin, then a translation 6 units to the left

-5 - (- 3)

• -8
• 8
• -2
• 15

Tags

CCSS.7.NS.A.1C

If you are adding 2 negative numbers, will your answer be positive or negative?

• negative
• positive

Tags

CCSS.7.NS.A.1C

If I have a negative multiplied with a positive, what will the answer be?

• Positive 
• Negative 

Tags

CCSS.7.NS.A.2B

CCSS.7.NS.A.2A

-4x + 1 = 21

• x=120
• x=5
• x=30
• x=-5

Tags

CCSS.6.EE.B.5

CCSS.6.EE.B.6

3 + (¹∕₄)a = 31

• a= 28
• a= 112
• a= 7
• a= 67

Tags

CCSS.7.EE.B.4A

8v - 4(v + 8) = 8

• 2
• 10
• 4
• -4 

Tags

CCSS.8.EE.C.7B

7 (1 + 2n) = -105

• 2

• 7

• -8

• 90909090909

Tags

CCSS.7.EE.B.4A