Step-by-step explanation:
1) -9 = 9 true/false
the answer is false because negative and positive quite unlike in terms.
2) -(-21) = -21
Using the symbols multiplication rule,
Where,
<h2>
+ × + = +</h2><h2>
- × - = +</h2><h2>
- × + = -</h2><h2>
+ × - = -</h2>
Therefore, -(-21) = +21 = 21
⟼ 21 = -21 
Its max is 780
2/3 + 1/6 = 5/6
650/5=130
650+130=780
Just do 6/3 because you have the area and one length, just divide the area by the height you have.
7 days because 12 per day 12×6=72 but you need 3 more acres so it would be another day for it to be 7
Answer:
7.3x10^-7
Step-by-step explanation:
you move the decimal to the right 7 times.
Hope this helps.
