Answer:
The least common denominator, also called lowest common denominator (LCD), of 10 and 15 is 30.
Step-by-step explanation:
21 divided by 7 is 3 so each candy bar equals 3 dollars
y=-0.5x+8
Opposite reciprocal of 2: -0.5
6=-0.5*4+b
6=-2+b
b=8
