Answer:
10.5 I think
Step-by-step explanation:
(1/2) *12 is 6
(1/2)*21 is 10.5
Answer:
infinite solutions
Step-by-step explanation:
Multiply the first equation by 2 so we don't have fractions.
x = 1/2y - 3 becomes 2x = y - 6
Now substitute the second equation into the y-value of the new equation
2x = (2x + 6) - 6
2x = 2x
x can equal anything. this means there are infinite solutions
Answer: 
Step-by-step explanation:

Add 4 to both sides


Divide through by 7


Therefore :

Answer:
A. [–1, 1]
Step-by-step explanation:
The range is the values that the output can take
The values that sin can take go from -1 to 1 inclusive
Answer:
Step-by-step explanation:
7 The difference between-5 and -12. (-5) + 12