8th grade MCA Practice

Number Sense

100

 -sqrt225

-15

200

sqrt150

lies between what two integers? 

12 & 13

300

What is 5^-3?

1/125

400

What value of n makes 

y^-5*yⁿ = y¹⁶ true? 

n = 21

500

What is the value of 3(4² + 5²)?

123

Expressions and Equations

100

Let y = 7x + 4. What is x when y = 18? 

x = 2

200

Let y = x² - 6. What is y when x = - 9? 

y = 75