An equilateral triangle sides are all equal to each other. This means that is one side of an equilateral triangle is x + 3 then the sides of the other two triangles as also each x + 3
The formula for perimeter of a triangle is:
Perimeter = side 1 + side 2 + side 3
Or in the case of an equilateral triangle it would be:
Perimeter = 3(side)
This means that for the formula of this equilateral triangle you have:
Perimeter = 3(x + 3)
If asked the three out side of the parentheses can be distributed, meaning that you multiply the outside number (in this case that is 3) to all the number inside the parentheses (in this case that is x and 3)
Perimeter = (3 * x) + (3*3)
Perimeter = 3x + 9
Both of these are correct:
P = 3(x + 3)
P = 3x + 9
Hope this helped!
~Just a girl in love with Shawn Mendes
Answer:
the answer is ![x=-\frac{5}{2}\quad \mathrm{or}\quad \:x=-2](https://tex.z-dn.net/?f=x%3D-%5Cfrac%7B5%7D%7B2%7D%5Cquad%20%5Cmathrm%7Bor%7D%5Cquad%20%5C%3Ax%3D-2)
Step-by-step explanation:
Try using Symbolab, I use it all the time it gives the correct answer and it gives good explanations.
If your referring to it when converted to inches, then 3.15 (3 15/100)
8 centimeters = 3.15 (3 15/100) inches
Number of people adopted a mantee through Fia's foundation = 40
30% more are people adopted a manatee
Number of people adopted = 30% of 40 = (0.30)(40) = 12
People adopted a manatee this year = number of people + 30% of 40
People adopted a manatee this year = 40 + 12
People adopted a manatee this year = 52