Answer:
13
Step-by-step explanation:

Hope this helps..
9-16x^2
This is the answer pretty much the 3 is okay but once you see the four notice there’s - and + you’d multiply it
25+80=105
180-105=75=a
y=90 because it’s a right triangle so
25+90=115
180-115=65=x
y=90
x=65
a=75
1. 2/2 - 1/2=1/2
2. 3/4-2/4=1/4
3. 2/4-1/4=1/4
4. 4/6-2/6=2/6
Are you you learning about subtracting fractions?
I’m pretty sure this is it, and you would shade in the parts that are left in the other circles.
for ln(x), the base is e, the natural base (aprox equal to 2.718281828454590...) or 
for log(x), if no base is stated, assume base 10 or 