Sarah looked at her watch before she began moving the grass the hour hand was between the 9 and the 10 the minute hand was on the 7 at what time did sarah begin moving the grass

How do you use the elimination method for this question? explain, because i really want to understand!

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?