Ablue whale's heart beats only 45 times in 5 minutes. write an equation comparing the number of beats to the number of minutes. at that rate, how many times would the blue whale's heart beat in 20 minutes?

Divide 45 with 5 to find out the amount of times the whale's heart beat per minute

45/5 = 9

9 times per minute

Now multiply 9 with 20

20 x 9 = 180

A whale's heart beats 180 times in 20 minutes

hope this helps

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

$113.42

i hope that is right.

step-by-step explanation: