Let:
• y, be the cost of the plan
,
• x, be the minutes spend on call
This way, we'll have:
Plan A:
Plan B:
If the two plans cost the same, we'll have that:
Solving for x :
A) The two plans will cost the same for 140 minutes on call
The cost will be:
B) $36.80
The acute angles of a right triangle are complementary, so:
We can solve this in many ways, let's try this one.
T∧2 = 4 pi∧2 * a∧3 / GM First we will multiply whole equation with variable( or parameter) M and get
M * T∧2 = 4 pi∧2 * a∧3 / G After that we will divide whole equation with variable ( or parameter ) T∧2 and get
M = 4 pi∧2 * a∧3 / G * T∧2
This is correct answer
Good luck!!!
Theorem: Tangent segments from the same external point are congruent
So the two expressions you can set equal to each other
3x+10= 7x-6
-3x -3x
10= 4x-6
+6 +6
16= 4x
X=4
