(9x-2y)/xy when x-4 and y=-2
2 answers:
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Answer:
Hence the weekly earnings of Nghiep= $136
Step-by-step explanation:
Let the weekly income of Nghiep be $ x.
As it is given that:
- Nghiep gave his mother half of his weekly earnings i.e. the amount he gave to his mother= $ (x/2).
So now we will be left with= $(x/2).
- Next he then spent half of what was left on a new shirt.
so the amount he spent on his shirt= $ (x/4)
Now he will be left with = $ (x/4).
Now it is given that the amount he had after spending on his shirt and giving to his mother= $ 34
i.e.
Hence, the weekly earnings of Nghiep= $136.
Answer:
AB = 3.3 cm
Step-by-step explanation:
The formula to find out area of a regular octagon is given by
where a is the length of each side of the regular octagon.
Plugin A=54 into the formula
Divide both sides by 2
Plugin √2 as 1.41
Divide both sides by 2.41
Taking square root on both sides
a = 3.346
a = 3.3 cm (rounded to nearest tenth)
so, length of side AB = 3.3 cm