I'm not good at math, but i really, really need help, what's the exact steps of 2+1(-1-3)?

Step-by-step explanation:

2+1(-1-3)

= 2+1[-(1+3)]

= 2+1(-4)

= 2+(-4)

=-(4-2)

=-2

i think it's like this

2-1-3

=-2

coin flip

non-answer:

choosing

sorry if this isnt what you're looking for i dont really understand the question

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.