Which expression is equivalent to 2(4x)? a) 2 4x b) (2×4)x c) (2 4x) × (2 4x) d) (2 × 4) (4 × 2x)

you probably already have the answer but anyways it's b. 15.0

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 -