What is the distance, in units, between -5, 8 and 4, -4 in the coordinate plane

The high temp today was 62°. when nighttime comes, the temp will drop 40°. by 4am the temp will drop an additional 40°. what is the temp at 4am?

Find the circumference of a pizza with a diameter of 10 inches round to the nearest tenth

Joline is solving the equation 0=x^2-5x-4 using the quadratic formula which value is the negative real number solution to her quadratic equation round to the nearest tenth if necessary