Answer:
The number of birds at the shelter on Tuesday is 21 .
Step-by-step explanation:
Given as :
The amount spent for each bird care = $ 1.50
The amount spend for each cat care = $ 8.50
Total amount spend for both bird and cat care = $ 108.00
The total number of birds and cats on Tuesday = 30
Now,
Let The number of birds = B
and The number of cats = C
According to question
B + C = 30 and ...........1
$ 1.50 B + $ 8.50 C = $ 108 ..............2
Solve both equations
I.e 1.50 × ( B + C ) = 1.50 × 30
Or , 1.50 B + 1.50 C = 45
So, ( 1.50 B + 8.50 C ) - ( 1.50 B + 1.50 C ) = 108 - 45
Or , (1.50 B - 1.50 B ) + (8.50 C - 1.50 C ) = 63
Or, 0 + 7 C = 63
∴ C =
I.e C = 9
Put The value of C in eq 1
So, B = 30 - C
or, B = 30 - 9
∴ B = 21
Hence The number of birds at the shelter on Tuesday is 21 . Answer