At the book fair 26 books were sold in the first 2.5 hours at this rate how many books will be sold in the 10 hours of the book fair A. 78
B. 26
C. 104
D. 52

Step-by-step explanation:

if 26 books were sold in 2.5 hours

26 books2.5 hours

? books10 hours

the books sold in 10 h

=(26*10)/2.5=104

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.

the answer is a

step-by-step explanation: