Roses sell for $3 each and carnations for$1.50 each. if a mixed bouquet of 20 flowers consisting of roses and carnations cost $39 how many of each type of flower is in the bouquet?

Need on this one asap im almost done with this subject

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Astudent 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