Answer:
It is correct
Step-by-step explanation:
20 + 30 = 50
Answer:
answer is 17.5cm²..this might help you out..
It's important because changing the order of operations changes the answer
Subtracting 
from both sides gives us the false statement 
so this equation can never be true and thus has no solutions.
X=number of books that cost 0.60
y=number of books that cost 0.75
x+y=16
0.6x+0.75y=10.95
solve
multiply second equation by 10 for nicity
6x+7.5y=109.5
multiply first equesiotn by -6 and add to second
-6x-6y=-96
<u>6x+7.5y=109.5 +</u>
0x+1.5y=13.5
1.5y=13.5
divide both sides by 1.5
y=9
sub back
x+y=16
x+9=16
minus 6
x=7
seven 0.60 books and nine 0.75 books
