Saturday

October 25, 2014

October 25, 2014

Posted by **Krissy** on Tuesday, January 15, 2013 at 9:33am.

1.Evaluate without a calculator, using the order of operations. -2^2+20-|8-20|-squareroot of 64

a. -36

b. 4

c. 28

d. -4

2.Simplify the expression. Square root of -16

a. 4

b. -4

c. -8

d. Not a real number

- College Algebra -
**Reiny**, Tuesday, January 15, 2013 at 10:27am-2^2+20-|8-20|-squareroot of 64

= -4 + 20 - 12 - 8

= -4

√-16 ----> not a real number

( in your first one, notice the difference between

-2^2 and (-2)^2 )

- College Algebra -
**Steve**, Tuesday, January 15, 2013 at 10:29am-2^2+20-|8-20|-√64

-4+20-|-12|-8

-4+20-12-8

-4

(D)

since x^2 >= 0 for all real x,

(D)

√-16 = 4i, a complex number

**Answer this Question**

**Related Questions**

College Algebra - I have a few more questions that I'm not understanding. Its ...

Stats - An instructor gives a test with 20 multiple choice questions. There are ...

Algebra Multiple Choice - Hello, This is the last of questions I have for my ...

Algebra multiple choice! - I have a few questions I need help with! Please ...

Algebra Multiple choice revised!! HELP - I have a few questions I need help with...

College Algebra - Last one for today! Again would appreciate a breakdown on how...

Maths - Multiple-choice questions in a test are graded by adding 2 marks for ...

Algebra 2 - I need help with this problem because I do not have a graphing ...

math - solve for x without using a calculator 5^(x+1) = 25 i know that x would ...

College Algebra - I need some help with a few problems. They are multiple choice...