Answer:
there are 15 birds all together and 5 black birds on the tree.
Step-by-step explanation:
He made a mistake in step #2. It seemed to be a trivial mistake because it involved signs, but it still had a great impact. Since step#2, his solution was already wrong.
Instead of
(-1)²-4(2)(-6) = 1 + 48 = 49
What he did is
(-1)²-4(2)(-6) = -1 + 48 = 47
Answer:
21.25
Step-by-step explanation:
85÷4=21.25
Answer:
A
Ratio is 2:1
Step-by-step explanation: