let f=cos^2(x)i+yj+z^2sin(x)k. calculate div(f) and curl(f)
September 14, 2021
The Hassle of Small Change- ECON
September 14, 2021

1.            The expression 6x^2-3x-4 has ___ terms and a constant of ____.

A.                    3, 6

B.                    3, -4

C.                    6, 6

D.                    6, -4

2.            The expression 3x^3-5x^2+3x-1 has ___ terms and a constant of ____.

A.                    
8, 1

B.                    
8, -1

C.                    
4, 1

D.                    
4, -1

3.            In 3y^4+5x^3+7x^3-2 what are the like terms in the expression? Choose all that apply.

A.                 5x^3

B.                 5y^2

C.                 7x^3

D.                 -2

4.            Combine like terms in the following expression: y+2x^2+5x^2

A.                 Y+7x

B.                 10x^4+y

C.                 7x^5

D.                 7x^2+y

5.            Subtract the second expression from the first. (5x^2-3x+5)-(3x^2-4x-7)

A.                 2x^2+x+12

B.                 2x^2-7x+12

C.                 8x^2+x+12

D.                 2x^2+x-2

6.            Distribute: 17(3x-4)

A.                 
-21x+28

B.                 
28x-21

C.                 
-21x-4

D.                 
-21x-28

7.            Evaluate the expression x^2-y for x=3 and y=2

A.                 
4

B.                 
7

C.                 
1

D.                 
2

8.            Evaluate the expression 4y^2-2x÷7+2y for x=7 and y=2.

A.                 
2

B.                 
4 2/7

C.                 
5

D.                 
18

 

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