39=1/2h = 78=h 52=(1/2 78)6+7 = 52=39+13
130 degrees!That should be your answer. :) Hope i helped
A.make tables showing the costs to rent a movie up to days.
A^2-64=0 you can factor like this:
(a+8)(a-8)=0 and since a>0, a must be 8
or you can do this:
add 64 to both sides of the equation leaving you with:
a^2=64 taking the square root of both sides
a=(-8,+8) and since a>0, a=8
Choose a random number , square it , then add 20
Ex) 2

= 4
20+4=24
Just keep doing that till all the squares are filled