Multiply the numbers being added then add the first number. 4X1=4, 4+1=5.
2X5=10, 10+2=12. 11X8=88, 88+8=96. I'm not sure how to get 40, though.
Hope I could help.
Answer:
I think that the answers are B, E, and F.
Step-by-step explanation:
Don't rate me if they are wrong.
1/49=x^2 where x is the side of the square
1/49=(1/7)^2, so the side length of the square is 1/7
For this case we have that the area of a circle is given by:

Where:
r: It is the radius of the circle
By clearing the radio we have:

We take the positive value:

The diameter is twice the radius:

Answer:
