The height of a triangle is fixed. What is the ratio of its area to its bottom?

The height of a triangle is fixed. What is the ratio of its area to its bottom?

If the height is fixed, its area is in direct proportion to the bottom

There are 24 4-wheel cars and 3-wheel motorcycles in the parking lot, with a total of 86 wheels. How many more 4-wheel cars than 3-wheel motorcycles?
emergency

If there are x 4-wheel cars, there are 24-x 3-wheel motorcycles
4X+3[24-X]=86
4X+72-3X=86
X=14
24-14=10
14-10 = 4
A: there are four more four wheeled cars than three wheeled motorcycles

Xiaoyue automobile sales company goes to an automobile factory to buy two types of cars a and B. with 3 million yuan, it can buy 10 type a cars and 15 type B cars. With 3 million yuan, it can also buy 8 type a cars and 18 type B cars? (2) If the car sales company can make a profit of 8000 yuan by selling a type a car and 5000 yuan by selling a type B car, the car sales company is going to buy 30 cars of a and B models with no more than 4 million yuan, and the total profit after all the two cars are sold is no less than 204000 yuan. How many schemes are there? In these schemes, how many million yuan will the car sales company make after selling all the cars?

(1) Suppose that each car of model a is x ten thousand yuan, and each car of model B is y ten thousand yuan. According to the meaning of the question, we get 10x + 15y = 3008x + 18y = 300, and the solution is x = 15y = 10

Xiaoyue automobile sales company goes to an automobile factory to buy two types of cars a and B. with 3 million yuan, it can buy 10 type a cars and 15 type B cars. With 3 million yuan, it can also buy 8 type a cars and 18 type B cars? (2) If the car sales company can make a profit of 8000 yuan by selling a type a car and 5000 yuan by selling a type B car, the car sales company is going to buy 30 cars of a and B models with no more than 4 million yuan, and the total profit after all the two cars are sold is no less than 204000 yuan. How many schemes are there? In these schemes, how many million yuan will the car sales company make after selling all the cars?

(1) Suppose that each car of model a is x ten thousand yuan, and each car of model B is y ten thousand yuan. According to the meaning of the question, we get 10x + 15y = 3008x + 18y = 300, and the solution is x = 15y = 10