X+13=5 what is the coefficient of the unknown in the expression?

Coefficient is the number in front of the variable. x is equivalent to 1x, therefore the coefficient is 1.

Blood, like other liquids, is governed by the laws of physics as it falls. it will accelerate to the earth as other objects as a rate of 9.8 m\s\s and the force of air resistance will slow its fall. if the droplets fall at a 90 degree angle to a relatively non-porous surface the resulting pattern will be an almost perfect circle. (e.g. try dropping red paint from an eyedropper directly above a white piece of paper). blood droplet with an angle of impact at 90 degreeswidth of droplet = 2.5 cm length of droplet= 2.5 cm = 1what angle has the sine of 1? 90 degreesas the angle of impact decreases a distortion of the droplet results. the droplet travels as a projectile and the bottom of the droplet will hit the floor first while top will continue along its path and result in a spatter elongation and sometimes a tail. the tail of the droplet corresponds to the direction the blood travels.sin x = width of stain\length of stain