3. What is the value of the expression x³yc³/x²y²c³ when x is 2, y is 3 and c is -2?

a. -27/16
b. 27/16
c. 32/27
d. -32/27

4. The area of rectangle is x² -3x -10. What is the length of the rectangle if the width is x+2?

a. (x+5)(x-2)
b.(x+5)(x-2)/x-2
c. x+5/x-2
d. x-5

5. what must be added to 3x+4/x²-4 so that there sum is 3x²+x-4/x²-4?

a. 3x+4/x²-4
b. -3x-4/x²-4
c. x+12/x²-4
d. x-12/x²-4

please answer ​