Answer: I dont use it for that. Sometimes, yes i need help but i read the explanation, and mainly i just answer
Step-by-step explanation:
Answer:
the least common multiple is 18
Step-by-step explanation:
Answer:

Step-by-step explanation:
Use the inverse cosine function.



Answer:
x = 20
Step-by-step explanation:
These angles are consecutive interior angles, so when added they will equal 180 degrees (according to the consecutive interior angles theorem).
3x - 10 + 5x + 30 = 180 add/subtract all like terms
8x + 20 = 180
8x = 160
x = 20 <--- This will be your answer
Hope it helps!