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Unit 7 MID (Lessons 1-5)

Authored by Nicole Williams

Mathematics

9th Grade

CCSS covered

Used 7+ times

Unit 7 MID (Lessons 1-5)
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20 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

No Solution

One Solution

Two Solutions

Answer explanation

Media Image

(4)(4) = 16 and (-4)(-4) = 16 so the solutions are

x = 4 and x = -4

Tags

CCSS.8.EE.A.2

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

No Solution

One Solution

Two Solutions

Answer explanation

Any number times zero must be zero. 8 times x2 has to equal zero. This means x2 must equal zero! Zero is neither positive or negative. Zero is zero.

Tags

CCSS.HSA-REI.B.4B

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

No Solution

One Solution

Two Solutions

Answer explanation

Media Image

(7)(7) = 49 and (-7)(-7) = 49 so the solutions are

x = 7 and x = -7. The picture of the graph rerepsents the quadratic when re-written to be equal to zero. x2 - 49 = 0.

Tags

CCSS.8.EE.A.2

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

No Solution

One Solution

Two Solutions

Answer explanation

Media Image

Using the zero product property x - 5 = 0 is true when x = 5 and x + 5 = 0 is true when x = -5

therefore, there are two solutions.

Tags

CCSS.HSA-REI.B.4B

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

No Solution

One Solution

Two Solutions

Answer explanation

Media Image

Using the zero product property x + 6 = 0 is true when x = -6 andx - 4 = 0 is true when x = 4

therefore, there are two solutions.

Tags

CCSS.HSA-REI.B.4B

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

No Solution

One Solution

Two Solutions

Answer explanation

Media Image

The black dotted line represents x2. When we add 4 to it the graph will shift up. The red line is x2 + 4. Since it does not go through the x-axis, there are no solutions for x.

Tags

CCSS.HSA-REI.B.4B

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

No Solution

One Solution

Two Solutions

Answer explanation

Media Image

There are two ways to think of this.

1st way: picture the graph of x2 , a U shaped graph going through the origin. Subtracting 9 will shift this graph down, causing it to cross the x-axis at two different spots. This means there are 2 solutions.

2nd way: as yourself what number minus 9 will give you zero. The only number that works is positive 9 so this means x2 = 9. The numebrs that you can square to get 9 are 3 and -3.

Tags

CCSS.HSA-REI.B.4B

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