Sandra tenía cierta cantidad de dinero para el fin de semana. El viernes gasto tres quintas partes del dinero que tenía y el sábado tres séptimas partes de lo que le quedaba. Si al final le quedaron 16 €
a) ¿Cuánto dinero tenía al principio?
b) ¿Cuánto gastó el viernes? c) ¿Cuánto gastó el sábado?

step-by-step explanation:

i found the koficent of the linear function and i foun c acordind to the strict formula y=kx+c and then i took 2 as an x and replacet it on the formula i found and then foun the y

2y+y=5

add 2y and y

elli's hot cocao is more chocolaty

step-by-step explanation:

rectangles are made up of 4 right angles, which means that a side and a base meet perpendicular to one another.   their slopes then have to reflect perpendicular slopes.   perpendicular slopes are opposite reciprocals of one another.   for example, if the slope of one line is +2/3, then the perpendicular slope to that would be -3/2.   so we look for that combination in our choices.

all of them satisfy that condition (so what's the question, i guess? )