Either one you can do would really help! Explanations would help but not required. 10 pts!!
To deliver mail, the Canadian Post Office uses postal codes beginning with a letter and alternating 3 letters and 3 digits, such as H9W 2B3. How many postal codes are possible with such a format? They use the digits 09, and the letters A to Z except O, which can be confused with zero.
Jennifer has a new summer job life guarding at the local swimming pool. One hot summer day, 242 people are at the pool. Jennifer notices that twice as many children as adult females are at the pool. Also, 10 fewer adult men than adult females are at the pool. Determine the number of children, female adults, and male adults that are at the pool.
To deliver mail, the Canadian Post Office uses postal codes beginning with a letter and alternating 3 letters and 3 digits, such as H9W 2B3. How many postal codes are possible with such a format? They use the digits 09, and the letters A to Z except O, which can be confused with zero.
Jennifer has a new summer job life guarding at the local swimming pool. One hot summer day, 242 people are at the pool. Jennifer notices that twice as many children as adult females are at the pool. Also, 10 fewer adult men than adult females are at the pool. Determine the number of children, female adults, and male adults that are at the pool.

25 x 10 x 25 x 10 x 25 x 10 = 250^3 = 15,625,000
2f + f + f  10 = 242
=> 4f = 252
i.e. f = 63
so, 126 children, 63 adult females and 53 adult males.
:)>
2f + f + f  10 = 242
=> 4f = 252
i.e. f = 63
so, 126 children, 63 adult females and 53 adult males.
:)>

Y'know. If you don't understand your homework you can always leave it and tell the teacher you didn't understand...