Im has 19{,}700\text { g}19,700 g19, comma, 700, start text, space, g, end text of sand in his sandbox. He brings home another 6{,}300\text { g}6,300 g6, comma, 300, start text, space, g, end text of sand from the beach to add to his sandbox. How many kilograms of sand does Jim have in his sandbox now? \text{kg}kg

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy

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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 -