There are 40 students that play a wind instrument in the
band, which is 80% who are in the band. How many
students are in the band?

50 students are in the band

Step-by-step explanation:

If 40 students is equal to 80% of the band, then we can represent this as an equation.

40 = 0.8y

y = total number of students in the band

in order to solve this equation, we have to divide both sides to isolate the y.

40/0.8 = y

Solve

50 = y

We can check to make sure that this is correct by putting to answer back into the equation.

40 = 0.8(50)

40 = 40

step-by-step explanation:

10.50 + taxes which added up to 11.50

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.