Answer : The equation could you use to find p is, 
Step-by-step explanation :
Let the cost of 1 pen be, 'x'
and the cost of 1 pencil is, 'p'
As we are given that total cost of 1 pen and 1 pencil is $2.10. The equation will be:
............(1)
And we have also given that the pen costs twice as much as a pencil. The equation will be:
............(2)
Now put the equation 2 in equation 1, we get:


Thus, the equation could you use to find p is, 
when we divides m(x) ÷n(x) quotient and remainder is
Answer:
18.7
Step-by-step explanation:
just add them
Answer:
C or D
Step-by-step explanation:
Answer: 50+10x
Answer: 25+10x
Answer: No. 50+10x=25+10x. In simplified form, it is 0 =25 which is undefined (no solution).