20 students want to buy unique thanksgiving leotards with real turkey feathers. Elena orders them online and has to pay $3 shipping on each one. If altogether the order costs $310. What was the cost of each leotard? Answer as a number to the nearest hundredth!

20(x+3) = 310

20x + 60 = 310

20x + 60 -60 = 310 - 60

20x/20= 250/20

x = 12.5

Step-by-step explanation:

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.