Answer:
Assuming you're referring to the sides of a right triangle, the missing side X would be 12.
Step-by-step explanation:
The Pythagorean Theorem states that the two legs of a right triangle squared and added together is equal to the hypotenuse squared. 
is 169, 
is 25, 169 - 25 = 144. Take the square root of 144 and you'll get 12, which is the missing side of the right triangle.
B. because 15 is not equal too 10
Answer:
-4 <x< -2
Step-by-step explanation:
you need to plot the line between -4 and -2
Answer:
D
Step-by-step explanation:
The area (A) of an equilateral triangle is calculated as
A = 
← s is length of a side
Here s = 12, thus
A = 
= 
= 36
→ D
I suggest you go to khan acadamey on youtube and look up this topic.
2: 23
3: B
hold on a sec i will keep answering but i wil post this part ill add the rest in the comments
