# College Algebra

posted by .

I have a few more questions that I'm not understanding. Its multiple choice however I would appreciate a breakdown on how to solve.

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 -

-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 -

-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

## Similar Questions

1. ### calculus

Use the function given to answer the following questions. g(x)= 2 x-2/(squareroot x)-2 The first 2 is set in the middle of the division line. I think signifying that you solve the x-2/(squareroot x)-2 first then multiple everything …
2. ### Stats

An instructor gives a test with 20 multiple choice questions. There are 4 responses per questions and only one choice correct. The test also has 30 True/False questions. Determine the probability a student randomly guessing on all …
3. ### College Algebra

I have a few more questions that I'm not understanding. Its multiple choice however I would appreciate a breakdown on how to solve. 4.Simplify the compound rational expression. Use either method. 1+(5/y-10)/y+(25/y-10) a. 1/y-5 b. …
4. ### Algebra

I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 …
5. ### Algebra

I need some help figuring these. Compute each product and simplify the result. I don't have the squareroot sign so put that meaning that's where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 …
6. ### College Algebra help!!!

I have to solve each equation using a u substitution and need help understanding how to do this. The first equation is: 1. x^2/3-2x^1/3-15=0 2. x+4=7 Squareroot x+4
7. ### Algebra Multiple Choice

Hello, This is the last of questions I have for my practice assignment. Again I will put what I got. Thanks for your help. 1.) Solve the system using substitution. Write answer as an ordered pair. 4x+2y=8 -5x-2=y A.) First equation …
8. ### Algebra multiple choice!

I have a few questions I need help with! Please explain if my answer was not right how you got to it. I got 1.) B 2.) A 3.) C 1. Solve the system by triangularizing the augmented matrix and using back substitution. If the system is …
9. ### Algebra Multiple choice revised!! HELP

I have a few questions I need help with! Please explain if my answer was not right how you got to it. I got 1.) B 2.) A 3.) C 1. Solve the system by triangularizing the augmented matrix and using back substitution. If the system is …
10. ### Algebra

An algebra teacher is writing a test. There will be two types of questions: multiple-choice and open-ended. The multiple-choice questions take 3 minutes to complete and the open-ended questions take 12 minutes to complete. There must …

More Similar Questions