8th grade Fast review

Real Numbers 8.AR.2.3

An equation is given. What is the value of x?

x² = 49

• 4

• 6

• 7

• 9

Real Numbers 8.NSO.1.2

Plot -3.42857... on a number line.

• 
• 

Real Numbers 8.NSO.1.1

Is 0.12345 a rational or irrational number?

and why?

• Rational number because it does terminate and can be written as a fraction

• Rational number because it repeats

• Irrational number because the decimal values continue

• Irrational number because it repeats

Exponents and Scientific Notation 8.AR.1.1

Write x⁵x⁸ with the variable x used only one time.

• x⁴⁰

• x¹³

• x^-3

• x³

Exponents and Scientific Notation 8.AR.1.2

what is the product of the expression?

0.25x (0.55x - 0.3)

• 0.1375 - 0.75

• 0.1375x - 0.075

• 0.13575x² - 0.075x

Exponents and Scientific Notation 8.AR.1.3

For the expression shown below, determine an equivalent expression

written as a common factor multiplied by the sum of two algebraic

expressions. Select all that apply.

125x² + 15x

• 5(25x² + 15x)

• x (125x + 15)

• 5 (25x² + 3x)

• 25 + 3

Exponents and Scientific Notation 8.NSO.1.4

In 2010, there were about 4 × 10⁷ people living in California and about

1 × 10⁶ people living in Rhode Island. How many times larger was the

population of California than the population of Rhode Island?

• 4 times bigger

• 40 times bigger

• 10 times bigger

Exponent and Scientific Notation 8.NSO.1.5

Write the expression shown as number in scientific number.

(8 × 10²)(7.5 × 10⁴)

(5 × 10²)

• 1.2 × 10⁵

• 12 ×10⁶

• 120 × 10⁶

• 120,000

Exponents and Scientific Notation 8.NSO.1.6

The Amazon River releases 5.5 × 10⁷ gallons of water into the Atlantic Ocean

every second. There are about 3.2 × 10⁹ seconds in a year. How many gallons

are released into the ocean in one year? Express your answer with the

appropriate number of significant digits.

• 8.7 × 10¹⁷

• 2.3 × 10¹⁷

• 1.71875 × 10¹⁷

• 1.8 × 10¹⁷