What is the value of
A. - 9
B. 9
C.-1/9
D.1/9

D

Step-by-step explanation:

You can ignore the power, since taking something to the power of one doesn't change the answer.

Anything to the 0 is going to be 1, so the answer is one over something.

The denominator is clearly going to be positive, regardless of what the symbol is.

With this in mind, it seems like the answer should be 1/9.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

the radius is 2 times the diameter.

step-by-step explanation: