Answer:

Step-by-step explanation:
Substitute the values for a and c into the expression
- 2c + a
= - 2×
+ 
= -
+ 
= -
+ 
= -
+ 
= 
Answer:
3.5 or 3 and a half of a apple
Step-by-step explanation:
You just divide 7 by 2
Answer:
Plot[-1 + 3^Surd[x, 3], {x, -20, 28}]