Nina is selling three types of energy bars at a market stall. She bought 80 Enerbars at 40p per bar and 180 Grainbars at 30p per bar from her normal supplier.
She was also given 40 Amazebars as a promotion from a new supplier.
Nina sells the bars for £2.25 and manages to sell all the Enerbars and Grainbars but only some Amazebars.
She makes a profit of £553.
How many Amazebars did she sell?

She sold 24 Amazebars.

Step-by-step explanation:

     Cost:

80 x 0.40 = 32

180x 0.30 = 54

40 x 0 = 0

Total = 86

     Income

80 x 2.25 = 180

180 x 2.25 = 405

X x 2.25 = 2.25x

Total = 585 + 2.25x

How many did she sell:

553 = 585 - 86 + 2.25x

553 = 499 + 2.25x

553 - 499 = 2.25x

54 = 2.25x

54/2.25 = x

24 = x

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )