Order of Operations and Number Properties 9 questions

  

1. Which gives the first two steps to evaluate 3-2(7+1)^2-1

A.                 Subtract 2 from 3, add 7 plus 1

B.                 Add 7 plus 1, multiply 2 times 8

C.                 Add 7 plus 1, square 8 *This is the answer I picked*

D.                 Add 7 plus 1, subtract 1 from 8.

 

2. Which of the following equalities are valid? Choose all that apply.

 

A.     (3^2+4)-2=11*I picked this*

B.     (3^2+4)-2=5

C.     2*(3^2-1)=16*and picked this*

D.     2*(3^2-1)=35

 

3. Which statement illustrates the identity property of multiplication?

               

 

A.                 11x+0=11x

B.                 11x+1x=12x

C.                 11x*1=11x *I guessed this one*

D.                 11x*0=0

               

 

4. Which statement illustrates the identity property of addition?

 

               

 

A.                 10x+1x=11x

B.                 10x+0=10x *I guessed this one*

C.                 10x*1=10x

D.                 10x*0=0

 

5. Which values for x and y make the statement (x – 9)(y + 4) = 0 true?

A.                 X=-9, Y=4

B.                 X=9, Y=4

C.                 X=-9, Y=-4

D.                 X=9, Y=-4

 

6. Which values for a and b make the statement (a – 2)(b + 3) = 0 true?

A.                 a = -2, b = 3

B.                 a = 2, b = 3

C.                 a = -2, b = -3

D.                 a = 2, b = -3

7. Which of the following gives an example of a set that is closed under multiplication? Choose all that apply.

A.                 The product of a prime number and a prime number

B.                 The product of a whole number and a whole number

C.                 The product of a negative number and a negative number

D.                 The product of a natural number and a natural number

8. Which of the following is the multiplicative inverse of 10/3

A. 10/3

B. 3/10

C. – 3/10

D. – 10/3

9. Which of the following is the additive inverse of -4b?

A. 4b

B. -4b

C. 1/4 b

D. – 1/4 b