Podrian ayudar con este ejercicio es de razones Si la diferencia de las edades de silvia y aurora es de 4 años y dentro de 10 años sus edades estaran en relacion de 10 a 9, halle la suma de las edades actuales de silvia y aurora

Which system of linear inequalities is graphed? can somebody please

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250