A sequence of a reflection across the x axis and then a reflection across the y axis always/ sometimes/ never results in a 180 rotation of the preimage

the correct answer is 45x

9×5=45 then add the x

each side has a different length.  

step-by-step explanation:

c > -10.55

step-by-step explanation:

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 -