Which expression is equivalent to 5(8+4)
A 8(5+4)
B) 4(8+5)
C) 5(9+3)
D) 5(10+1)

5(8+4)=60

Step-by-step explanation:

To find the answer answer each one to get 60

A. 8(5+4)=64

B. 4(8+5)=52

C. 5(9+3)=60

D. 5(10+1)=55

So that means C is correct.

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.

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19