Mary palm's checking account had a starting balance of $785.63. she wrote a check for $57.00 for groceries and a check for $125.00 for a car payment. yesterday she deposited $57.25 in her checking account. what is mary's current balance?

Could someone with number 1 and 2

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.