10p - 3p-2/4+5 when p = 10

*I'm in 5th grade pls help*

(01.04 mc) an ice sculpture is melting because of heat. assuming its height changes bynegative 5 over 32m every hour, what will be the change in height after 4 hours?

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial