Find the points of inflection of the graph of the function. (If an answer does not exist, enter DNE.)
f(x) = 2 sin x + 2 cos x, [0, 24]
(x, y) = (4.0
(smaller x-value)
(x, y) = (0
(larger x-value)
Describe the concavity. (Enter your answers using interval notation.)
concave upward
DNE
concave downward

Select all expressions that are equivalent to 2(3x + 7y). question 1 options: 6x + 14y 6x + 7y 1(6x + 14y)

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )

Step by step explanation pls for 10 pts the length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?