How fo i know what words are feminine and masculine?

My spanish teacher said this to me.. look at the ending on your verb. you need to make it agree with "yo" this is my sentence- sí yo estudiar español en la escuela how do i make it agree with "yo"

Read and select the correct sentence. va al casa. va a el casa. va a la casa. va en casa.

The exchange rate is 156 pesos for 1 us dollar. it costs 10,218 pesos to check an extra piece of luggage on the plane. you have $65 us dollars. which of the scenarios below best reflects your ability to check your extra piece of luggage? a. whew! you have just enough! b. oh no, you will have to leave your extra piece of luggage behind! c. you have enough to check your extra piece of luggage and buy a coffee for the flight. d. if you can scramble to find some spare change in your pocket, you can check your extra piece of luggage.