Answer:
expresión
Step-by-step explanation:

since a diameter is twice as long as the radius, this one is also
2r.
The slope is equal to -4.
Hope this helps!
What type of an equation?
Simplify 9^2/9^7 into
1/9^5 <——that could be the simple answer. If to fully simplify it solve 9^5 which would give you
1/59049