What is 7*-8? my calculator wont work because i cant do problems with negative # on it.

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

Which part of a 2-column proof is the hypothesis of the conjecture? a) given b) reasons c) prove d) statements ! i think it's b but i'm not quite

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)