The price of an article on sale was 80% of the regular price. if the sale price was $56, what was the regular price?

regular price = 70

Step-by-step explanation:

you are paying 80 percent of the regular price

regular price * 80 percent = new price

regular price * .8 = 56

divide by  .8 on each side

regular price *.8 /.8 = 56/.8

regular price = 70

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.

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%