Answer:
Function rule is option c.
3* (b+9) = 4
Step-by-step explanation:
b is the unknown number
Three times the sum of a number and 9 is 4.
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Given :
TV cost = 800 £
VAT = 20 %
Amount of VAT
= 20% of 800
= 800 × 20 /100
= 160 £
So Total cost of TV
= original price + VAT
= 800 + 160
= 960 £
Thanks ❤
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