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• rachel is feeling ill. which symptom indicates that rachel’s illness is related to her ear and that she should consult a doctor?
  
• a student draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.
  
• which best describes earth’s magnetic field lines? the field lines go out of earth at the geographic south pole and enter earth at the geographic north pole in the area where the magnetic pole aligns with the geographic pole. the field lines go out of earth near the geographic south pole and enter earth near the geographic north pole in an area where the magnetic pole does not align with the geographic pole. the field lines go out of earth at the geographic north pole and enter earth at the geographic south pole in the area where the magnetic pole aligns with the geographic pole. the field lines go out of earth near the geographic north pole and enter earth near the geographic south pole in an area where the magnetic pole does not align with the geographic pole.
  
• what is the value of startfraction 1 over 6 superscript 0 endfraction? one-sixth 0 1 undefined
  
• which of the following is an odd function? f(x) = x3 + 5x2 + x f (x) = startroot x endroot f(x) = x2 + x f(x) = –x
  
• if a transversal crosses three non-parallel lines, how many pairs of vertical angles are formed? explain your answer.
  
• the population in the united states in 2000 was about 281 million people. in 2015, it was 321 million people. from 2000 to 2015, the population increased %.
  
• the graph for the equation y = x minus 4 is shown below. on a coordinate plane, a line goes through (0, negative 4) and (4, 0). which equation, when graphed with the given equation, will form a system that has an infinite number of solutions? y minus x = negative 4 y minus x = negative 2 y minus 4 = x y + 4 x = 1
  
• read the sentence. valerie saw a colorful bird on her way to school. choose the version of the sentence with the modifier in the correct place. a colorful bird on her way to school, valerie saw. on her way to school, valerie saw a colorful bird. valerie saw on her way to school a colorful bird. a colorful bird saw valerie on her way to school.
  
• find the product of the elements on the main diagonal of matrix a: d1 = (a11)(a22) =