491 people used the pool. It costs $1.25 for kids and $2.25 for adults. The total cost was $757.75. How many kids and how many adults used the pool?

Step-by-step explanation:

Let x represent the number of adults using the pool. Then 491 -x is the number of kids using the pool, and the total revenue is ...

  2.25x +1.25(491 -x) = 757.75

  x +613.75 = 757.75 . . . . . . . . . eliminate parentheses, collect terms

  x = 144 . . . . . . . . . . . . . . . . . . . . subtract 613.75; number of adults

  491-x = 347 . . . . . number of kids

347 kids and 144 adults used the pool.

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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