Find the instantaneous rate of change of the function at the specified value of x. f(x) = x2 – 3 ; x = 4

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

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?