Enter the value of "p" so the expression 3 (4 + n) is equivalent to 3 (n + p). If you answer correctly I will give brainliest<3

Ineed asap.i cant understand this question i need someone to me right away

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

In dire need~! describe how to use area models to find the quotient 2/3 divided by 1/5. check your work by also finding the quotient 2/3 divided by 1/5 using numerical operations only.