Which substitution method should be the best used to solve which system of equations

Which phrase best discribes how scientists use the data they collect A 29-year-old female complains of a sore throat and runny nose for 3 days. Today she notes she is having difficulty breathing due to frequent and severe coughing spells. She is alert and oriented, and her vital signs are P 84, R 20, BP 122/80. Given her symptoms, you should suspect: What did President Nixon believe about the American public in the 1970s?a, Most Americans opposed the Vietnam War. b, Most Americans disagreed with the counterculture. c, Most Americans knew communism was not a threat.d, Most Americans thought the draft was unfair. the answer is b, I did the test What is the answer I need help pls Hello, can someone please help me as soon as possible? It will me appreciated greatly and I will mark brainliest. Which microscope is used to check organelles of human cheek cell? En mi ninez, me gustaba el futbol y yo______, en la Calle. please if you don't know don't answer 1. y = 5x + 2, (2,7) Which expression is equivalent to 15x + 3? 15(1x + 1) 5(3x + 1) 3(5x + 1) 2(15x + 3) Geometry Question:Find the value of x that makes N the incenter of the triangle (See attached) Which of the tables represents a function?Table AInput Output5 35 24 1Table BInput Output1 23 25 3Table CInput Output0 01 21 3Table DInput Output4 24 34 4 Table A Table B Table C Table D Convert the Following: 5.4 oz=__________ mg What should you do if the chest does not rise with each breath? A. Reopen the airway and try again B. Blow harder C. Stop rescue breath attempts D. None of the above Any advice/message to all the people about toxicity? I dont understand so please HELPPPPPPPPPPPPPP what are some examples of Buddhism's political effects on China? If any of yall can give me the definition for these words I will give 5 stars ,like and brainlest or whatever its called What are the answers? What is the slope of the line through (-4,2)(4,2)left parenthesis, minus, 4, comma, 2, right parenthesis and (3,-3)(3,3)left parenthesis, 3, comma, minus, 3, right parenthesis? Choose 1 answer: Choose 1 answer: (Choice A) A \dfrac57 7 5 start fraction, 5, divided by, 7, end fraction (Choice B) B \dfrac75 5 7 start fraction, 7, divided by, 5, end fraction (Choice C) C -\dfrac57 7 5 minus, start fraction, 5, divided by, 7, end fraction (Choice D) D -\dfrac75 5 7