Answer:
7.5
Step-by-step explanation:
5/6=x/9
cross multiply
6x=45
x=45/6
x=7 3/6 = 7 1/2 = 7.5
Only the third one makes x=-1 true
Answer:

Step-by-step explanation:
Similar shapes also maintain a constant proportion of sides. Therefore, we can set up the following equation:

Solving, we get:

Answer:
4.2
Step-by-step explanation:
5.7-1.5=4.2
Answer:
2 3/10, 2.59, 24
Step-by-step explanation: