Which expression represents the sum of 8 and twice a number?

a.) 8+n8+n

b.) 8+2n8+2n

c.) 8×2n8×2n

d.) 2×(8+n)

answer: 0+0=0

step-by-step explanation:

that is the only answer that can make 0

answer: median

step-by-step explanation:

the median is the middle value when a data set is ordered from least to greatest

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 -

the answer to question 1 is -8, 28.

step-by-step explanation: