Sarah's nurse counted 18 beats in her pulse in 15 seconds. At this rate, how many beats would she have in 60 seconds?

72 beats per 60 second

Step-by-step explanation:

18 x 4 = 72

multiplied by 4 , because 15 sec x4=60 seconds

could also 18/15=1.2 beats per sec

1.2*60=72

answer: 1, 3 and 5 are correct

step-by-step explanation:

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.