a) 300-70h=30
b) 300+70h=30
c) 300+70h=-30
d) 300-70h=-30

The answer is A I believe because...
You can't have a negative hour and you're trying to figure out what H is solely, so you want to subtract not add.

The first equation represents how many hours the bus has traveled

I chose A because the initial distance is 300 and you have to find how long it takes to reach a distance (left) of 30 km and the rate is already a given. Since you are getting closer to the destination the distance decreases.

X = 3.39 (Quesadilla)    Y= 1.69 (Tacos)

Step-by-step explanation:

You need to do systems of equations.

You take the quesadillas which is X and the Taco is Y and plug them into the equation with the total like this:

2x + 2y = $10.16

x + 5y = $11.84

solve and you get

(3.39, 1.69)