507 people use the public swimming pool , the daily price for children is 1.75 and the price for adults is 2.25 and the admission total was 971.75 how many children were at the public pool

338 children

Step-by-step explanation:

Assume the children are represented by x and the adults are y.

Relevant equations will be:

x + y = 507 people

1.75x + 2.25y = 971.75

y = 507 - x

1.75x + 2.25 * ( 507 - x) = 971.75

1.75x + ‭1,140.75‬ - 2.25x = 971.75

1.75x - 2.25x = 971.75 - ‭1,140.75‬

-0.5x = -169

x = -169/-0.5

x = 338 children

Adults = 507 - 338

= 169 adults

the answer is d. 75%

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!