A.
PEMDAS
Parenthesis always comes first, then exponents, multiplication and division, adding and subtracting
Answer:2
Step-by-step explanation:
Because 15= x+4+9
Answer:
n >_44
Step-by-step explanation:
1/2n>_22
(times 2 on both sides)
n >_44
*** >_ is greater than or equal to sign