4x-6= x+6
4x= x + 12
5x= 12
X= 12/5
X= 2.5
Answer:
4
Step-by-step explanation:
Answer:
<h2>x = 1</h2>
Step-by-step explanation:
Look a t the picture.
The triangles on the picture are similar.
Therefore the sides are in proportion:
<em>cross multiply</em>

<em>divide both sides by 40</em>

Answer:
D
Step-by-step explanation:
70% as a fraction is 70/100
Answer:
Option B. 
Step-by-step explanation:
we know that
The formula to solve a quadratic equation of the form
is equal to
in this problem we have

so
substitute in the formula
Remember that

substitute
