11 is the answer.
10+10=20
20-9=11
11+9=20
11
Question 5, x could be either 6 or -1.
Answer:
(A°/360°)*2s is a part of the circumference of the circle with radius s that is the base of the cone. It is equal to 2r, which is the circumference of the cylinder.
Step-by-step explanation: