B)12
Step-by-step explanation:
60=5x-10
+10 +10
70=5x
÷5 ÷5
x=12
D
It can give some balls more chance to be picked, making it unfair
Answer:
Each side of triangle A changed by a factor of 1/2.
The unknown side length in triangle B has a measure of 7.5.
Step-by-step explanation:
He made each side 1/2 as long so it changed by a factor of 1/2. 1/2 times 15 is 7.5.