Solve by using a system of two equations in two variables. (Show your work) A father, being asked his age and that of his son, said, "If you add 4 to
my age and divide the sum by 4, you will have my son's age. But 6 years ago I was 7 1/2 times as old as my son.” Find their ages.

Δabc is reflected across line l to form δ alblcl, and a¯¯¯al¯¯¯¯ intersects line l at point d. which equation is not necessarily true?

Atype of plant is introduced into an ecosystem and quickly begins to take over. a scientist counts the number of plants after mmonths and develops the equation p(m)= 19.3(1.089)^m to model the situation. most recently, the scientist counted 138 plants. assuming there are no limiting factors to the growth of the plants, about how many months have passed since the plants werefirst introduced? a)o 6.1b)0.6.6c)10 72d)o 23.1

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.