What is the Area of the triangle?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Talia took the bus from her home to the bank and then walked back to her home along the same route. the bus traveled at an average speed of 40 km/h and she walked at an average speed of 5 km/h. to determine the time, x, that it took talia to walk home, she used the equation 40(0.9 – x) = 5x. the time of trip 2 is hours. the distance of trip 1 is km.

1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go