Pemdas
Parentheses exponents multiplication divide add subtract (7+5)=12
12+4•13-2 4•13= 52
12+52-2
64-2
The answer is 62
Answer:
15
Step-by-step explanation:
3 and 5 are not common denominators so you have to find the lowest common denominator which is 15 because 3 times 5 is 15
Answer:

Step-by-step explanation:
Cosine is the ratio of the side adjacent to the angle and the right triangle hypotenuse.
B =
= 
Its A. x=4
procedure: 3*equation1 - 2*equation2 ⇒ x=4
Your answer is C :) blessings