6
A contractor needs to purchase 500
10.2 cm by 20.3 cm, and the density of each brick is
to purchase 500 bricks. The dimensions of each brick are 5.1 cm by
density of each brick is 1920 kg/m”.
The maximum capacity of the contractor's trailer is
500 bricks? Justify your answer.
entractor's trailer is 900 kg. Can the trailer hold the weight of

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step-by-step explanation:

i’m here for points.

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 -