Alittle while ago, a dolphin was swimming below sea level at -7 meters. now the dolphin is jumping at 0.5 meters. what does this mean?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

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 statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.