Answer:
C. Carolyn did not subtract 4 from both sides of the equation.
Step-by-step explanation:
3x-2(x+2)=7 should be 3x-2x-4=7 not 3x-2x+4=7
Answer:
first one
Step-by-step explanation:
Tracey bought 10 movies
some cost 13 and the others 16
Let x be the movies that cost 13 and y ones that cost 16
we can state that
since Tracey both ten
since the total price is 139
so the system is :

Answer:
bn+c=
tn=t1+(n-1)d
Step-by-step explanation:
bn+c=
tn=t1+(n-1)d∛²