Answer:
D
Step-by-step explanation:
Pythagoras theorem
the square of the hypotenuse= (adjacent) square +(opposite) square
20% 25-20 equals 5. 5 divided by 20 equals .2 or 20%
D have neither a cat nor a dog
Answer:

Step-by-step explanation:
Given

(a): Write as additive inverse.
An additive inverse is of the form a + (-b)
In this case:


So, the expression can be represented as:

(b): Number line representation
When the expression in (a) is solved.
The result is:

This means that the number line must accommodate 7 and -1.
Having said that, options (b) and (c) are out because their range is 0 to 15 and this excludes -1.
Option (d) is a wrong representation of 
Hence, (a) is correct