Quiz about 8th Grade Math Assessment III

Question 1

What is the scale factor of the dilation from preimage XYZ to image X'Y'Z'?

Accepted Answer

1.4

Answer

.4

Answer

.8

Answer

1.2

Question 2

What is the rule that describes the translation that maps $$\Delta KZI$$ onto $$\Delta K$$

Accepted Answer

2 units right and 1 units down

Answer

2 units right and 2 units up

Answer

2 units left and 2 units up

Answer

2 units left and 1 units down

Question 3

Which of the following statements is true about the coordinates of the points in a figure when the figure is reflected over the x-axis?

Accepted Answer

Only the x-values remain the same.

Answer

Only the y-values remain the same.

Answer

Both the x- and y-values remain the same.

Answer

Both the x- and y-values change.

Question 4

Triangles DEF and LMN are similar. Use the triangles to answer Parts A and B. Which proportion could be used to find LN?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 5

The graph shows how much toast a cafe owner makes in a day, and how much bread she has left. What type of association does the data she collected have?

Accepted Answer

A negative, linear association

Answer

A positive, linear association

Answer

No association

Answer

A nonlinear association

Question 6

Eric recycles bottles at the local recycling center to earn money for a new bike. Eric keeps track of how much he has earned in this graph. What type of association does the data collected show?

Accepted Answer

A positive, linear association

Answer

A negative, linear association

Answer

No association

Answer

A nonlinear association

Question 7

Select all numbers that are rational.

Accepted Answer

3

Accepted Answer

$$3.\overline{75}$$

Accepted Answer

$$\frac{1563}{25}$$

Answer

$$-\ \sqrt[]{2}$$

Question 8

Which fraction is the closest estimate to $$\sqrt[]{10}$$ ?

Accepted Answer

$$3\ \frac{1}{5}$$

Answer

$$2\ \frac{1}{2}$$

Answer

$$3$$

Answer

$$\frac{1}{10}$$

Question 9

Select the correct symbol to make the comparison sentence true.

$$-2.08193...$$ ____ $$-\ \sqrt[]{7}$$

Accepted Answer

$$>$$

Answer

$$<$$

Answer

$$=$$

Question 10

Which expression is equivalent to $$5^2 imes5^4 imes5^{-3}$$ ?

Accepted Answer

$$5^3$$

Answer

$$5^{-24}$$

Answer

$$5^1$$

Answer

$$5^5$$

Question 11

Select all the pairs of expressions that are equivalent.

Accepted Answer

$$5^{-1} imes5^{-1}\ and\ 25^{-1}$$

Accepted Answer

$$8^0 imes8^{3\ }and\ 8^3$$

Answer

$$6^7\div6^{-2\ }and\ 6^5$$

Answer

$$4^{-3} imes4^2\ and\ 4^5$$

Question 12

Which is the best estimate of 7,625,750,263?

Accepted Answer

$$8 imes10^9$$

Answer

$$7\ imes10^{10}$$

Answer

$$7 imes10^9$$

Answer

$$8 imes10^{10}$$

Question 13

Find $$\left(5.8 imes10^4 ight)+\left(7.17 imes10^6 ight)$$ .

Accepted Answer

$$7.228 imes10^6$$

Answer

$$1.297 imes10^7$$

Answer

$$1.297 imes10^6$$

Answer

$$7.228 imes10^5$$

Question 14

Simplify the expression.

$$2.25\left(-4\right)^2+\sqrt[3]{5^2+2}$$

Accepted Answer

39

Answer

17.5

Answer

28.25

Answer

42

Question 15

Apply the Laws of Exponents to simplify the expression below.

$$\left(3m^2n\right)^3$$

Accepted Answer

$$27m^6n^3$$

Answer

$$9m^3n^6$$

Answer

$$9m^6n^3$$

Answer

$$27m^3n^6$$

Question 16

$$\left(2.4 imes10^3 ight) imes\left(3 imes10^n ight)=7.2 imes10^9$$

Accepted Answer

6

Answer

3

Answer

9

Answer

12

Question 17

$$\left(6.4 imes10^3 ight)\div\left(3.2 imes10^2 ight)$$

Accepted Answer

$$2 imes\left(10 ight)^1$$

Answer

$$2 imes10^2$$

Answer

$$2 imes10^5$$

Answer

$$2 imes10^6$$

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