Of the 150 houses in a certain development, 60 percent have air-conditioning, 50 percent have a sunporch, and 30 percent have a swimming pool. if 5 of the houses have all three of these amenities and 5 have none of them, how many of the houses have exactly two of these amenities?

There are 70 houses that have exactly two of these amenities.

Step-by-step explanation:

Number of house in a certain development = 150

Number of houses have air conditioning n(A)=

Number of houses have sunporch n(B) =

Number of houses have swimming pool n(C) =

Number of houses have all three amenities = 5

Number of houses have none of them = 5

So, remaining houses = 150-5=145

As we know the rule of sets:

Hence, there are 70 houses that have exactly two of these amenities.

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.

b mark me branliest thx

step-by-step explanation: