Step-by-step explanation:
1/2 × (p+9) is the algebraic expression.
To find the number or rows, divide the total number of students by the number in each row.
63 / 7 = 9 rows.
12subtract4
12-4
they want me to write more then 20 charaters
Answer:
5
Step-by-step explanation:
AC=AB+BC
so 16=x+1+x+7
which simplifies to 16=2x+8
subtract eight from both sides to get 8=2x
then divide by 2 to get that x=4
AB=x+1, which substitutes into 4+1=5
