Sabrina y Diana asistieron a una conferencia fuera de sus respectivas ciudades. Despues de de la conferencia, Sabrina regresa a su casa conduciendo a una velocidad promedio promedio de 65 millas por hora, mientras que Diana lo hace a una velocidad promedio de 50 millas por hora. Si la suma de sus tiempos de recorrido es igual a 11.4 horas, y si la suma de las distancias recorridas es igual a 690 millas, determine el tiempo que cada una de ellas necesito para llegar a casa.

Sabrina necesito 8 horas para llegar a su casa mientras que Diana necesito solo 3.4 horas.

Step-by-step explanation:

debemos resolver la siguientes equaciones:

A + B = 11.4

65A + 50B = 690

donde:

A = tiempo que le toma a Sabrina llegar a su casa

B = tiempo que le toma a Diana llegar a su casa

A = 11.4 - B

65 (11.4 - B) + 50B = 690

741 - 65B + 50B = 690

741 - 690 = 65B - 50B

51 = 15B

B = 51 / 15 = 3.4 horas

A = 11.4 - 3.4 = 8 horas

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.

15% chance.

step-by-step explanation:

3/10 times, the 5 year old will get a tablet. 5/10 times, the 13 yer old will get a tablet. multiply both fractions to get 15/100 times, both would have a tablet.