They didn’t use the distributive property correct because they didn’t multiply 5x3
Answer:
x = 12
Step-by-step explanation:
The diagram shows an equilateral triangle (because all angles are congruent). All sides in equilateral triangle are congruent, so

Solve the equation

Check this value:

Thus, 
The formula for point slope form is (y-y1) = m(x - x1)
In this formula m will always be the slope. So, you can substitute 3 in for m
(y-y1) = 3(x-x1)
y1 is the y-coordinate and x1 is the x-coordinate. So, you can substitute them in and you will be done.
(y - 1) = 3(x - (-2))
But since it is minus a negative it changes to a positive so it would be:
(y -1) = 3(x + 2)
Hope this helps!
The transformation(s) that can be used to map one triangle onto the other is : (C). dilation, then translation
<h3>Meaning of dilation and translation</h3>
Dilation can be defined as the process of compressing and reducing a shape to a particular scale
Translation can be defined as a process of transferring a shape from one point to another.
In conclusion, The transformation(s) that can be used to map one triangle onto the other is : (C). dilation, then translation
Learn more about dilation and translation: brainly.com/question/21369817
#SPJ1