D(5, 7), E(4, 3), and F(8, 2) form the vertices of a triangle. What is m∠DEF?

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2