Answer:
Step-by-step explanation:
let 2x be the length of chord tangent to first circle.
so x=√(14²-6²)=√(14+6)(14-6)=√(20×8)=√160=4√10
length of chord=2x=2×4√10=8√10
5
2/5 is the same thing as 2÷5 since / and ÷ both mean to divide. So therefore your blank would be 5.
y=9 when x=8
y=18 .............x=?
y=9/8 *8= 9/8 *x
x=y :9/8=18 :9/8=18*8/9=16
so b is correct
B