Maria solved the equation -5 1/8n = -9 3/4 . her answer was n = 1 37/41 . she is fairly confident about her answer, but wants to do a quick check of her solution using estimation.
which of the following shows a good check of her answer?

-6(2) = -12
-5(-2) = -10
-5(2) = -9
-5(2) = -10

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

you need to upload the picture of the circle.

step-by-step explanation: