Simon makes a model of a boat, using a scale of 1 : 30 If the model has a height of 40 cm, find the height of the real boat. Give your answer in metres.

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step-by-step explanation:

π^°×{{€€

answer: a

step-by-step explanation:

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

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 -