Me at southside middle school, 40% of the students play an instrument. there are 305 students. how many students play an instrument? a.40 students b.140 students c.122 students d. 256 students

40

Step-by-step explanation:

i looked it up         ωФω         ⊕↔⊕

c

Step-by-step explanation:

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

1/800 is the right answer