小華囝;-D

暑期hw黎:-)
1) a store bought 250eggs for $200 and foung that 25 of them were cracked.The rest of the eggs will be sold at a percentage profit of not greater than 35%, Find the maximum selling price of each egg

2)Is there any regular polygon with exterior angles of 27° each?Explain briefly.

3)It is known that the mean of the number of push-ups done by S2A boys in a minute is21;that done by the S2A girls is 9;and that done by the whole class is13.4. If there are 30 students is S2A, find the number of boys and the number of girls in the class.

iamsiuyanyan

1) let $x be the  maximum selling price of each egg
(225x-200)/200 <= 35%
x<=1.2
the  maximum selling price of each egg is $1.2

3)let x be the number of boys and y be the number of girls
(21x+9y)/30=13.4...................(1)
x+y=30......................................(2)
.
.
.
x=11
y=19

MrBenwong

2. Let a polygon with n sides.
27n = 360
     n = 13.3333333333
Since n must be a positive integer, therefore the polygon required does not exist.

小華囝;-D

thanks