Answer:
B) 1, 2, 2, 1
Step-by-step explanation:
In given equation:
Left side: Right Side:
2 Na 1 Na
1 S 1 S
1 H 2 H
1 Cl 1 Cl
To equal the number of Na and H atoms on both sides, HCl and NaCl will have a coefficient of 2 to balance the equation while Na₂S and H₂S will have a coefficient of 1.
1 Na₂S + 2 HCl ⇒ 2 NaCl + 1 H₂S
Answer:
Step-by-step explanation:
The nth term of a geometric sequence is given by the following equation.
In which r is the common ratio.
This can be expanded for the nth term in the following way:
In which 
is the first term.
This means that for example:
So
Then
Answer:
B. A numerical expression
-7d > 21
d < -3
Remember the sign flips when you multiply or divide by a negative number.
Answer: A
Step-by-step explanation: -2 is your y-int and if you do your rise over run it’s -1/2
