We can use trigonometry. The cosine of 15 will be the side adjacent to the 15-degree side (the one we are looking for) divided by 20, the hypotenuse. As cos(15) is about .966, we get 19.32 as the side we are looking for.
Answer:
3x+y= -6
Step-by-step explanation:
Operations like +, - separates the terms.
Ex: 2x²+ 4yz-z
The probability of rolling 5 five on a dice would be 1/5
