Answer:
try the third option
Step-by-step explanation:
At least I'm trying
Answer:

Step-by-step explanation:
To solve for s, you need to follow these steps.
First multiply by t both sides of the equation.


We get 
Now we divide by r, both sides of the equation.

Finallly we obtain:
or

Answer: x=90
Step-by-step explanation: 11 x 7.5 =90
Answer:45
Step-by-step explanation: