How do I solve -2a = -24

12

Step-by-step explanation:

you would divide -2 on both sides to isolate the variable a leaving you with 12

12

Step-by-step explanation:

-2a= -24

or, a= -24/-2

:. a= 12

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.

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.