M8 - Review for Exam #1

The Pythagorean Theorem states that . . .

• $a=\frac{b}{c}$

• $a-b=c$

• $a=\sqrt{b-c}$

• $a^2+b^2=c^2$

Which of the following numbers is irrational?

• $\sqrt{139}$

• $\sqrt{1}$

• $\sqrt{144}$

• $\sqrt{81}$

Tags

CCSS.8.NS.A.1

The decimal 0.55555555 ... can be written as which simplified fraction?

• $\frac{5}{10}$

• $\frac{5}{9}$

• $\frac{1}{2}$

• $\frac{1}{5}$

Tags

CCSS.8.NS.A.1

CCSS.7.NS.A.2D

 $\sqrt{53}$  is between which two integers?

• 5 and 6

• 6 and 7

• 7 and 8

• 8 and 9

Simplify the expression:  $6^{-2}$  

• -36

•  $\frac{1}{36}$  

•  $\frac{1}{12}$  

• -12

What are the two solutions of the equation    x² = 19   ?

• $\pm361$

• $\pm19$

• $\pm9.5$

• $\pm\sqrt{19}$

Write the number 4,810,000,000 in scientific notation.

• 4.81 x 10⁷

• 4.81 x 10⁹

• 48.1 x 10⁸

• 481 x 10⁷

Tags

CCSS.8.EE.A.3

Do (5 x 10⁴) · (3 x 10⁸) and write your answer in scientific notation.

• 1.5 x 10¹³

• 15 x 10¹²

• 15 x 10³²

• 1.5 x 10³³

Tags

CCSS.8.EE.A.4

A calculator screen reads 9.1 E 17. Which of these numbers is it trying to display?

• 9.1 x 17¹⁰

• 9.1 x 10¹⁷

• 9.1 x 1¹⁷

• 1.547 x 10¹⁹

Tags

CCSS.8.EE.A.3

Which of the following should be your first step in solving the equation 4x – 11 = 9 ?

• Divide both sides by 4

• Add 11 to both sides

• Multiply by sides by 4

• Add 9 to both sides