Perform the indicated operation.
(-10) = (-20)

The operation would be marked as undefined

Step-by-step explanation:

Many people don't feel comfortable using negative numbers so find the absolute values of both numbers.

|-10| = |-20| to 10 = 20

Since 10 is not equal to 20, it is undefined

Just in case

If you meant (-10)x = (-20) Then do this:

-10x = -20

/-10      /-10   Divide by -10 do get x

A negative divided by a negative makes the answer positive.

-20/-10 = 2

x = 2

question is incomplete.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.