Socks cost $5 per pair. the expression 5p represents the cost in dollars of p pairs of socks. why must p be a whole number?

Can anyone me with 32,33,36,37,and 40.

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18