Please help! 3 inches on a blueprint of a classroom equals 9 feet for the actual room

a) what is the scale of the blueprint?

b) if the dimensions of the classroom is 23 ft X 30 ft what are the dimensions of the blueprint?

c) if the window on the blueprint is 1.5 inches wide, what is the actual width of the window?

14 pointslet x be the seats in the small van and y the seats in the large van. how many seats does the large van have? a company uses two vans to transport worker from a free parking lot to the workplace between 7: 00 and 9: 00a.m. one van has 9 more seats than the other. the smaller van makes two trips every morning while the larger one makes only one trip. the two vans can transport 69 people, maximum.how many seats does the larger van have?

What is the lcm of 16 and 40 ? 24 and 40 ?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?