7th grade science need help

if a dinosaur has a mass of 55g, what is his density PLEASE HELP!Formulate a conclusion about what happens to the pH of a substance when anacid and base are mixed. Los muelles de un remolque estn calibrados para soportar su peso, cuando se carga el remolque con 2100 kg, la fuerza ejercida es de 20580 N comprime los muelles de un remolque 5,5 cm a)Longitud que desciende el remolque si se carga con 28000 N b)Si ha descendido 4,2 cm la carga What are url addresses for visiting websites? And what are the different parts of a URL? Answer it in a 1-2 paragraph Find the square root of -36.A-6B 6C Cannot be done difference between Planned and unplanned urbanization Yesterday noah ran 2 1/2 miles in 3/5 hour. Emily ran 3 3/4 miles in 5/6 hour. Anna ran 3 1/2 miles in 3/4 hour how fast in miles per hour did each person run? Who ran the fastest? !!SHOW WORK!! dudee plz help will be given the brainlist if answered correctly What is the slope of the line?pls help I need the answer please I need some help with both questions. answer the following correctly Subtract -7x^2+4x+2 from x^2-3x A boy weighs x pounds. His younger sister weighs 53 pounds less than him. His father weighs four times as much as his sister. A simplified expression that represents the fathers weight (in pounds) is (blank -blank) definition of the denouement does anyone have a course hero premium account because i found what i need but it is blurred please help me i really need it asap. and i cant afford it so i would really appreciate it. Use the equation below to find y, if m=3 ,x=4 , and b=9y=mx +b the force that holds paticles together in the atomic nuecleaus? What did King George III place in the colonies without their permission even during times of peace?HELPP Simplify the following expression: -4(k - 7) 1. Why did many people think that Governor Henry S. Johnston was so unusual?HELPPP!!!